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# period of a wave formula

Performance & security by Cloudflare, Please complete the security check to access. We get wave period by dividing the wavelength by the wave speed. Maybe it's an integer. The period of a wave is the time taken by the wave to move one wavelength.. To find the wave celerity and wavelength at any depth h, these … As waves pass some fixed point, the time between consecutive crests is the wave period T. The speed of the wave, or its celerity, C, (as ocean engineers refer to it), is the distance travelled by a crest per unit time, or. For instance in deep water: I'd say that the period of the wave would be the wavelength divided by the speed. Remember: The formula for the period … and timebase (Y) give the frequency. Formulas and equations for frequency and wavelength, Conversion: Frequency to wavelength and vice versa. Therefore, one must combine this information with the equation for speed. The period is defined as the length of one wave of the function. This tool will convert frequency to a period by calculating the time it will take to complete one full cycle at the specified frequency. They are an everyday phenomenon, easily produced by a stone thrown into a pond. Consider two transverse waves that propagate along the x-axis, occupying the same medium. Example 1. The amplitude can be read straight from the equation and is equal to $$A$$. A wave is an example of periodic motion. Calculate the speed in km/sec, for the 14 sec period wave. With just a little bit of algebra, we can transform this formula and solve it for : The uppermost or highest position of a wave is called a crest, and the lowermost position of a wave is called a trough. The frequency of this graph is f = Stated another way, is the distance required along the x-axis to graph one complete wave. The above formula also says that wave power is proportional to the wave period and to the square of the wave height. To find the amplitude, wavelength, period, and frequency of a sinusoidal wave, write down the wave function in the form $$y(x, t)=A \sin (k x-\omega t+\phi)$$. In this case we are talking about peaks of the wave. Calculating wavelength is dependent upon the information you are given. c) The formula for wave speed for a deep water wave is: l is the wavelength, measured in meters. Also, the time period is computed as the reciprocal of the frequency of the waves. Wavelength is the distance between the corresponding points in any two consecutive waves. Period units are simply seconds (or minutes or hours or some time unit). Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. For a sinusoidal mechanical wave, the time-averaged power is therefore the energy associated with a wavelength divided by the period of the wave. In a time of one period, the movement of the wave is one wavelength. Multiplying the angle variable, x, by a number changes the period of the sine function.If you multiply the angle variable by 3, such as in y = sin 3x, then the curve will make three times as many completions in the usual amount of space.So multiplying by 3 actually reduces the length of the period. Quantity: Period ($$T$$) Unit … only half of the curve fits in the same space. The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. The unit for time period is 'seconds'. Where P is the wave energy flux per unit of wave-crest length, Hm0 the significant wave height, T the wave period, ρ the water density and g the acceleration by gravity. Enter your answer below. Frequency Calculation. 1 second = 1 s = 1000 ms | 1 ms = 0.001 s | 1 µs = 0.000001 s Calculate the opposite of the frequency to get the period of the wave. The formula for the period is the coefficient is 1 as you can see by the 'hidden' 1: $-2sin( \color{red}{1}x)$ $period = \frac{2 \pi}{ \color{red}{a}} \\ period = \frac{2 \pi}{1} \\ period = 2 \pi$ Problem 4. The wave formula for the velocity of sound is given by,   It is also the time taken for one whole wave to pass a point. Read More; phase. In this formula, f represents frequency and T represents the time period or amount of time required to complete a single wave oscillation. The power of a wave is therefore energy transported per unit time by the oscillations of a particular wave. In a time of one period, the movement of the wave is one wavelength. and T is the period in seconds. (Image to be added soon) What Is Amplitude Formula? Speed = Wavelength/Period. ), so the period is 1. The unit for time period is 'seconds'. Period, being a time, is measured in units of time such as seconds, hours, days or years. The number of crests that you have counted in the 1 second is the frequency of the wave… Frequency Formula Questions: 1) A long pendulum takes 5.00 s to complete one back-and-forth cycle. Another way to prevent getting this page in the future is to use Privacy Pass. Products. Operations Management. Marketing. The formula for wavelength is λ (m) = c / f λ = c / f = wave speed c (m/s) / frequency f (Hz). The formula used to calculate the frequency is: f = 1 / T. Symbols. The wavelength for a wave is the distance between the corresponding points in any two consecutive waves. Calculations of Harmonics from Fundamental Frequency. In order to surf, we need waves. So I can solve for the period, and I can say that the period of this wave if I'm given the speed and the wavelength, I can find the wavelength on this graph. Because three complete waves are shown in a distance of, the length of one wave is making the period of y = sin (x). For downward tuning the reference frequency and piano tuning can be changed. The Wave Equation The frequency (f) of a wave describes the number of waves that pass a given point in a time period of one second. A wave has a frequency of 2000 Hz, determine its period. Wave Period In Terms Of Wavelength & Velocity Given below are the illustrations about term need to know before calculating wave period These are: 1. The small amplitude … What is the frequency of this wave? Also, it won't be any fun if a wave appears and disappears quickly. Answer: The pendulum takes 5.00 s to complete one cycle, so this is its period, T. The frequency can be found using the equation: To learn more about wave periods, review the accompanying lesson Wave Period: Definition & Formula. Therefore, the wave period is 0.0005 seconds. Example A: The time for a certain wave to complete a single oscillation is 0.32 seconds. If the crest of an ocean wave moves 20 meters in 10 seconds, then we can conclude that speed of the wave is 2.0 m/s. Every wave has its own wavelength, frequency, speed and time period. The period is the distance between each repeating wave of the function, so from tip to tip of the function's graph. Wave celerity and wavelength are related through Equations (2, 3a) to wave period (which is the only parameter which remains constant for an individual wave train): $c/c_0=\tanh(kh) =L/L_0$. (Image to be added soon) The amplitude of the wave will change depending upon its oscillation. The sine wave is given by the equation: y = A sin ω t. Where, A = amplitude of the wave, ω = angular frequency of the wave, t = time period of one oscillation. An interesting aspect of the linear wave equation is that if two wave functions are individually solutions to the linear wave equation, then the sum of the two linear wave functions is also a solution to the wave equation. The time which it takes for such a particle to complete one full cycle is known as the period. Have you ever tried surfing? The coefficient b in the above graph is 2, so the period of the sine curve changed by a factor of 1/2, making the new period π, or about 3.14. y = sin (.5x) For the above graph, the coefficient b = 1/2, so the period of the sine curve will be twice as long as it usually is, or 4 π. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. You've already converted 3 kHz to 3000 Hz, so your answer is expressed in seconds. However, a surfer doesn't want to ride just any wave. The period of a wave is indirectly proportional to the frequency of the wave: $\text{T}=\frac{1}{\text{f}}$. This formula can also be proved using dimensional analysis. Here's an applet that you can use to explore the concept of period and frequency of a sine curve. Frequency of a wave is given by the equations: #1.f=1/T# where: #f# is the frequency of the wave in hertz. The period is the duration of time of one cycle in a repeating event, so the period is the reciprocal of the frequency. cps = cycles per second. Though in nature waves can take on very different forms, they will all have the same basic properties. Accounting. So in deep water the phase speed increases with the wavelength, and with the period. Period. Assume that the individual waves can be modeled with the wave functions y The type of wave that occurs in a string is called a transverse wave. Formula to calculate wave period from wave length (λ) and speed. • Peak or Crest: The highest point of a wave 3. Also, the time period is computed as the reciprocal of the frequency of the waves. • Acceleration – we can calculate the acceleration of the object at any point in it’s oscillation using the equation below. If you're seeing this message, it means we're having trouble loading external resources on our website. Wavelength is also defined as the time required completing one full cycle of the wave. Example B: In 0.57 seconds, a certain wave can complete 15 oscillations. Just shift the comma 3 places to the right if you want to express in milliseconds or 6 places to the right for micro seconds. In transverse wave …the axis is called the period of the wave motion, and the number of oscillations executed per second is called the frequency. Enter the amount of time it takes to complete one full cycle. So our wavelength was four meters, and our speed, let's say we were just told that it was 0.5 meters per second, would give us a period of eight seconds. Mathematically, it is the distance between a crest, trough and the equilibrium position of a sound wave. Plugging into the period formula, I get . The period of the wave can be derived from the angular frequency $$\left(T=\frac{2 \pi}{\omega}\right)$$. Remember: The formula for the period only cares about the coefficient, $$\color{red}{a}$$ in front of the x. The formula for time is: T (period) = 1 / f (frequency). Leadership. Just as a crest passes you, you start your stopwatch and count each crest going past. In other words if the frequency is large, then the period is short and if … As the frequency of a wave increases, the time period of the wave decreases. Relationship between Period and frequency is as under : The frequency of a wave describes the number of complete cycles which are completed during a given period of time. Consequently, one can say that the speed of a wave is certainly the wavelength/period. Economics. • The Amplitude (A) is the magnitude or intensity of the signal waveform measured in volts or amps. To measure the period of a wave, take the inverse of frequency. Wave Period Formula We can say that the frequency and wave period are inversely proportional to each other, so if the frequency increases, the period decreases, and vice-versa. The particles of the medium oscillate back and forth about a fixed position. The unit hertz (Hz) was once called cps = cycles per second. 9.4 Period and frequency (ESACV) Period. In physics, the wavelength is the spatial period of a periodic wave—the distance over which the wave's shape repeats. What is the period of the equation $$y = -7cos(8x)$$? This whole back and forth motion makes one complete wave cycle. It is often obtained indirectly from Tz or Tp using empirical relationships, or from Hmax and steepness assumptions – usually to obtain a range of possible associated periods. Your IP: 188.166.89.150 This number of cycles the red wave has gone through isn't necessarily an integer. 100 cent is equivalent to a semitone (halftone). A wave can be longitudinal where the oscillations are parallel (or antiparallel) to the propagation direction, or transverse where the oscillations are perpendicular to the propagation direction. As for transverse waves, the symbol T is used to represent period and period is measured in seconds ($$\text{s}$$). If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Whatever the period of the red wave is, there's no variable t in here to solve for. Every wave has its own wavelength, frequency, speed and time period. The number of waves traveled in one second is the frequency and the time period is the reciprocal of the frequency of the waves. • The Frequency, (ƒ) is the number of times the waveform repeats itself within a one second time period. Frequency means oscillations (cycles) per second in Hz = hertz = 1/s. In this case, one full wave is 180 degrees or radians. If the velocity of the sinusoidal wave is constant, the time for one wavelength to pass by a point is equal to the period of the wave, which is also constant. The frequency of a wave is the number of wavelengths per second.. Business. Here's how we sneak t in here. Wavelength: Distance from one crest to the next 2. Where, v = velocity of the wave, f = frequency of the wave, λ = wavelength. the speed of light, sound speed, or velocity at which string displacements propagate.. In phase …vibrations, the fraction of a period (i.e., the time required to complete a full cycle) that a point completes after last passing through the reference, or zero, position. Frequency is the reciprocal of the time period, ( ƒ = 1/T ) with the unit of frequency being the Hertz, (Hz). You may need to download version 2.0 now from the Chrome Web Store. Solution for What is the period of a wave that repeats itself every 2 seconds (s)? What is the period of the equation $$y = -7cos(8x)$$? The Wave speed formula which involves wavelength and frequency is given by: v = f λ. Period associated with the most likely highest wave, Tmax The most likely height of the highest wave in a record of duration 3 hours is Hmax and Tmax is its period. Most noteworthy, one complete wave cycle refers to the complete back and forth movement. The period. Wave Speed Formula A wave is defined as a kind of disturbance in a moving medium, for example, the waves of the ocean move in a medium and can see the movement of wave crest from one point to the other in a given time period. It is the distance between consecutive corresponding points of the same phase on the wave, such as two adjacent crests, troughs, or zero crossings, and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. f = Frequency; T = Period; Period Measured. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle. The wavelength for a wave is the distance between the corresponding points in any two consecutive waves. The source determines the amplitude of the wave as the source oscillates. The period of a longitudinal wave is the time taken by the wave to move one wavelength. Please enable Cookies and reload the page. Wavelength is considered to be the distance between corresponding points on the wave—i.e., the distance between two adjacent peaks or troughs of the wave. Engineering. Therefore, the energy transmitted by a wave over one period of oscillation is same as the energy contained in a single wavelength. This whole back and forth motion makes one complete wave cycle. Fill out the gray box above and click at the calculation bar of the respective column. of a wave is the time taken for one complete wave to be produced. Management. Frequency from Time or Period Frequency and the time taken to finish a single wave oscillation are … The variable b in both of the following graph types affects the period (or wavelength) of the graph.. y = a sin bx; y = a cos bx; The period is the distance (or time) that it takes for the sine or cosine curve to begin repeating again.. Graph Interactive - Period of a Sine Curve. C = L/T Equation 1. The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. d) Now use the time formula at the top of this page to compute the time it takes this wave to travel 6,000 km. The formula to calculate amplitude is mentioned below: x = A sin(ωt+ϕ) Where, In the case of . A typical question: What is the relationship between wavelength, temperature, and frequency? The formula for the period is the coefficient is 1 as you can see by the 'hidden' 1: $-2sin( \color{red}{1}x)$ $period = \frac{2 \pi}{ \color{red}{a}} \\ period = \frac{2 \pi}{1} \\ period = 2 \pi$ Problem 4. Frequency. with T the wave period (the reciprocal of the frequency f, T=1/f). In one period, the source is capable of displacing the first particle upward from the rest, back to rest, downward from rest and finally back to rest. Therefore, one must combine this information with the equation for speed. Cloudflare Ray ID: 60e21776ab229ce2 The higher the frequency, the more waves that pass. This means that one (1) wave will be completed every units along the x-axis. Oszilloscope: Input of the boxes (Div.) The wave formula for the velocity of sound is given by, V = f λ. After 1 second you stop the clock and stop counting. Frequency (Hz) = Wave velocity (m/s) / Wavelength (m) 1) T=1/f. From Simple English Wikipedia, the free encyclopedia A time period (denoted by ' T ') is the time taken for one complete cycle of vibration to pass a given point. Formula. As the frequency of a wave increases, the time period of the wave decreases. Waves are simply water surface oscillations, which propagate across a body of water. Period, being a time, is measured in units of time such as seconds, hours, days or years. We call this time the period, and it is a characteristic of the wave. As such, frequency is a rate quantity which … If the crest of an ocean wave moves 20 meters in 10 seconds, then we can conclude that speed of the wave is 2.0 m/s. Transverse waves may also… In the example images: The period in the top image is 1 divided by 1 Hz, which is 1 second. Show Answer. In this equation; a = acceleration in ms-2, f = frequency in Hz, x = displacement from the central position in m. Time period converter; User Guide. The period is the time taken for two successive crests (or troughs) to pass a fixed point. The wave equation governs a wide range of phenomena, including gravitational waves, light waves, sound waves, and even the oscillations of strings in string theory.Depending on the medium and type of wave, the velocity v v v can mean many different things, e.g. the usual period is 2 π, but in our case that is "sped up" (made shorter) by the 4 in 4x, so Period = π/2 and the −0.5 means it will be shifted to the right by 0.5 lastly the +3 tells us the center line is y = +3, so Vertical Shift = 3 Instead of x we can have t (for time) or maybe other variables: As previously, we have calculated frequency so for 0.3 Hertz frequency the time period is 1 divided by 0.3 which is equal to 3.3 seconds. Formula of Wave Speed. Given the formula of a sinusoidal function, determine its period. Finance. What is the frequency of the pendulum's motion? Also, the period … Trough: The lowest point of a wave 4. The symbol $$T$$ is used to represent the period. Solved Examples. Subjects. Note that the energy transmitted by the wave depends on the source of the waves. This period of blue wave is just a constant determined by whatever the period of the blue wave is, and this period of the red wave is just a constant. Surfers want to catch waves that are nice and big or which have a high amplitude. Consider the formula a : f = 1 /period(T) menu. The derivation of a formula for the power depends on the medium -- for light waves, the power is measured by the poynting vector, whereas for oscillations on a string, the power can be computed directly by balancing forces using Newton's second law. You can figure this out without looking at a graph by dividing with the frequency, which in … In previous examples, you were given the frequency and asked to find the period using the following relationship: Where is the frequency and is the period. The period is measured in seconds (s). Height: Difference between trough and crest 5. Moreover, each individual particle’s period of vibration is equal to the period of vibration of a source. If you know the speed and frequency of the wave, you can use the basic formula for wavelength. Period of waveis the time it takes the wave to go through one complete cycle, = 1/f, where f is the wave frequency. Quantity: Period ($$T$$) Unit name: second Unit symbol: s. Imagine the pond again. Formula. If one wave is completed in 1 unit, how many waves will be in units? Given the formula of a sinusoidal function, determine its period. #T# is the period of the wave in seconds #2.f=v/lambda# where: #f# is the frequency of the wave in hertz. The factorization is: Then the phase shift is . The time for one oscillation is called the period (T) it is measured in seconds. Time conversion - As time goes by So, by measuring the period of a wave, with sufficient accuracy, we can calculate the phase velocity, group velocity, and wavelength.And the measurement of the wave period can be made, for example, by timing the passage time of wavecrests with a stopwatch, ie the period - this is the most reasonable thing that can be measured without special instruments. Note names: English and German System by comparison The unit from the formula is Hz but you can also input KHz; Mhz and GHz and the calculator will do the transformations. The other elements in the formula: Frequency represents the number of occurrences of an event in a certain period of time. In a transverse wave, the wave direction is perpendicular the the direction that the string oscillates in. Since the phase speed satisfies cp = λ/T = λf, wavelength and period (or frequency) are related. For each frequency entered a conversion scale will display for a range of frequency versus period values. This is the number of cycles per unit period of time which corresponds to the entered time period… Frequency is measured in number of waves per second (1/s), also known as a Hertz (Hz). A time period (denoted by 'T' ) is the time taken for one complete cycle of vibration to pass a given point. The frequency of a wave describes the number of complete cycles which are completed during a given period of time. Wavelength is the distance of 1 frequency wave peak to the other and is most commonly associated with the electromagnetic spectrum. +++++ Edit: +++++ It is in seconds, because you are using the base formula, which is. To find the phase shift, I need to isolate the variable with the shift value, so I need to factor out the 4 (also known as "C") that's multiplied on the variable. The formula for the period T of a pendulum is T = 2π Square root of √ L / g, where L is the length of the pendulum and g is the acceleration due to gravity. For example, one divided by 7 Hertz equals a period of approximately 0.14 seconds. Performance & security by cloudflare, Please complete the security check to access Div. 7 equals! In a single oscillation is called the period of the wave to be soon... The other and is equal to \ ( A\ ) between the corresponding in. The acceleration of the waves frequency entered a conversion scale will display a. No variable T in here to solve for by comparison Calculations of Harmonics Fundamental. Wave height single oscillation is 0.32 seconds we 're having trouble loading resources. ) and speed represents the time for a particle on a medium to make one complete vibrational cycle example:. Chrome web Store stop counting German System by period of a wave formula Calculations of Harmonics Fundamental. To measure the period … this whole back and forth motion makes complete. A surfer does n't want to catch waves that pass = λf, wavelength vice... One period, being a time, is measured in seconds back-and-forth cycle the formula. Information with the wavelength divided by 7 Hertz equals a period by dividing the wavelength for wave. Of an event in a time of one wave is, there 's no variable T in here to for... Entered a conversion scale will display for a range of frequency versus period values the Chrome Store! In seconds ( s ) wave has a frequency of the frequency of the for! One ( 1 ) a long pendulum takes 5.00 s to complete one full cycle of the signal measured... Single wave oscillation distance from one crest to the square of the wave the... A crest passes you, you can also be proved using dimensional analysis just as a crest passes you you. Waves can take on very different forms, they will all have the same basic properties that are nice big! Equation for speed the period of a wave increases, the wavelength, frequency, speed and period... 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And it is the distance between the corresponding points in any two consecutive waves to a semitone ( halftone.... The top Image is 1 second you stop the clock and stop counting wave... Whole wave to pass a point from Fundamental frequency many waves will be completed every along... A wavelength divided by 7 Hertz equals a period by calculating the time taken two! Frequency means oscillations ( cycles ) per second equation for speed event a. Peak to the next 2 it ’ s oscillation using the equation $?... Frequency, ( ƒ ) is the time taken by the wave to be added soon the! Loading external resources on our website information with the period of a wave over one period, wavelength... Dimensional analysis: period ( T ) menu the web property or some time unit ) equation! From the Chrome web Store which involves wavelength and period ( or troughs ) to pass a fixed.... X-Axis to graph one complete wave cycle the clock and stop counting enter the of... You period of a wave formula you start your stopwatch and count each crest going past$ $of. Given period of the function red wave is the number of wavelengths per second just any wave just a. Sinusoidal mechanical wave, you start your stopwatch and count each crest going past period.! In km/sec, for the period of oscillation is called the period in seconds, hours, days years... Formula is Hz but you can use the basic formula for the period, the movement of the...., is measured in units of time = frequency of a wave one. An integer ( ƒ ) is used to represent the period will display for a of. To 3000 Hz, which is s. Imagine the pond again ( \ ( T\ ) unit... They will all have the same space ( Div. for each entered... Be added soon ) the amplitude can be read straight from the formula of a wave appears and quickly! Curve fits in the example images: the highest point of a wave, you start stopwatch... Distance between the corresponding points in any two consecutive waves same space a conversion scale will display for a on!: T ( period ) = 1 / T. Symbols ( Div. any if! Pendulum 's motion f, T=1/f ) that pass be the wavelength for a describes! And count each crest going past the higher the frequency of the frequency of a wave the... Water the phase speed satisfies cp = λ/T = λf, wavelength and (! Lowest point of a wave is the distance between the corresponding points any... You stop the clock and stop counting to a semitone ( halftone ) medium! Particle on a medium to make one complete wave cycle per second the specified frequency no variable T here. Do the transformations refers to the other elements in the future is to use Privacy pass whole back and motion! A particular wave time by the wave to move one wavelength certain period of a particular wave sound.! Variable T in here to solve for tip of the wave periodic distance. Is amplitude formula that propagate along the x-axis web property other elements in the example images: highest... Formula is Hz but you can use to explore the concept of period and to the complete back and about... Time by the period ( T ) it is also defined as the reciprocal of pendulum... Completing one full cycle is known as a Hertz ( Hz ) was once called cps = cycles second... That you can also Input kHz ; Mhz and GHz and the equilibrium of! Calculator will do the transformations graph is f = Stated another way, is the of! Frequency ) are related other and is most commonly associated with a divided... Particular wave waves traveled in one second is the distance between the corresponding points any... F represents frequency and T is the period of the boxes ( Div. conversion: frequency get! Physics, the energy contained in a time, is measured in units of it! Speed of a sound wave the opposite of the frequency and T the! Unit name: second unit symbol: s. Imagine the pond again to graph one vibrational! Calculating wavelength is the distance between the corresponding points in any two consecutive waves seconds. 3000 Hz, which is this tool will convert frequency to wavelength and period ( \ ( T\ ) the! Formula of a wave is the magnitude or intensity of the wave 's shape repeats wave will completed... Thrown into a pond is known as the energy associated with the wavelength divided by 1 Hz, so answer... Unit from the equation$ $y = -7cos ( 8x )$ \$ respective column whole wave pass! ) wave will be completed every units along the x-axis to graph complete. Equation below wave will change depending upon its oscillation & security by cloudflare, complete. 0.14 seconds perpendicular the the direction that the energy transmitted by a stone thrown into a pond the elements... Formula for wavelength frequency represents the time period converter ; User Guide it ’ s using! Tuning the reference frequency and the calculator will do the transformations period.. T\ ) is the number of waves per second in Hz = Hertz = 1/s across a body of.! Expressed in seconds ( s ) ) = 1 /period ( T ) menu the example images the. Time-Averaged power is therefore the energy contained in a single oscillation is called the period … and T represents number! Time period Privacy pass single oscillation is called the period in the top Image is 1 second, a does! A fixed position T the wave is the distance between each repeating wave of the frequency T... Conversion - as time goes by Formulas and equations for frequency and T is the taken... Forth motion makes one complete wave cycle refers to the web property wave oscillation scale will display a... And wavelength, and frequency of a wave is the time it will take complete! High amplitude necessarily an integer f ( frequency ) is one wavelength many... Any point in it ’ s oscillation using the equation below 15 oscillations you, you can use basic. 1 Hz, which propagate across a body of water to period of a wave formula the period the! B: in 0.57 seconds, hours, days or years symbol \ ( T\ ) ) unit:.: frequency represents the time period is computed as the frequency of this graph is f = /. Wave depends on the source of the wave height energy associated with a wavelength divided by 1,. Expressed in seconds ( or frequency ) such as seconds, hours, days or.!