Wavelength Formula

Wavelength Formula

Whether on television or in person, everyone has witnessed waves. Surfers enjoy riding on them as well. But the fact that one utilises the Wavelength Formula to measure wavelength is something that most people are unaware of. In addition, students will go over the Wavelength Formula definition, Wavelength Formula, Wavelength Formula derivation, and some cases with solutions. Additionally, after thoroughly understanding the Wavelength Formula, students will be able to comprehend and compute the wavelength of waves with ease.


The Wavelength Formula alludes to the fluctuation of water’s surface brought on by the wind. Additionally, energy is transmitted from the wind to the water due to the frictional action of the air and water molecules. In addition, Wavelength Formula in science represents the flow of energy.

The Wavelength Formula of a wave, particularly the points of an electromagnetic wave, is the distance between two successive crests. Wavelength Formula and frequency are closely related phenomena in physics. The wavelength decreases as frequency increases. The Wavelength Formula determines the total number of wave crests travelling at a single spot per second when all light waves travel through space at the same speed. 

The Wavelength Formula can be written as follows: 

According to the Wavelength Formula, a wave’s wavelength is 

λ = v/f 


F = frequency. 

v = the wave’s velocity 

Wavelength is measured in m, frequency in Hz, and speed is measured in m/s.


The Wavelength Formula can be defined as the separation between wave crests. Additionally, a wide variety of objects move in waves, including light, the earth or ground, water, strings, air, and sound waves. 

Furthermore, students use the Greek letter lambda () to denote the wave’s wavelength. In addition, the wave’s Wavelength Formula is determined by dividing its velocity by its frequency. Additionally, students may use metres (m), which is the unit used to indicate wavelength in metres.

Wavelength Formula

The Wavelength Formula of a wave, specifically the points of an electromagnetic wave, is the separation between successive crests. The relationship between Wavelength Formula and frequency is close. The wavelength gets shorter the higher the frequency. Since all light waves travel through a vacuum at the same speed, the Wavelength Formula determines how many wave crests pass at a specific point each second. 

The symbol for the Wavelength is. Any wave’s Wavelength Formula is provided by 

λ = v/f 


V is the wave’s velocity. 

the frequency f 

The units for wavelength, velocity, and frequency are m, m/s, and Hz, respectively.

Derivation of the Formula

A waveform’s wavelength is the separation between similar spots in adjacent cycles. 

The Wavelength Formula is dimensionally written as [m0 l1 t0], just as the formula for distance is [m0 l1 t0].

Solved Example on Wavelength Formula

  • Example 1 

Along a rope, a harmonic wave is travelling. The wave-generating source moves 50 times back and forth in 20 seconds. Determine the wave’s wavelength if a trough moves 3 metres in 4 seconds. 


20 seconds are needed for 50 oscillations. 

T = 20/50 = 0.4 s is the duration of one oscillation. 

One oscillation’s frequency is f = 1/0.4 = 2.5 Hz. 

The wave moves 3 metres in 4 seconds. 

V = 3 / 4 is used to compute the wave speed. 

= 0.75 ms-1 

The wavelength equation is = v / f. 

= 0.75/2.5 

λ = 0.3 m. 

  • Example 2 

A tuning fork has a frequency of 200 Hz, and while it vibrates 30 times, sound travels 20 metres. Identify the sound’s wavelength. 


Given: frequency 200 hertz (Hz), 

d = 20 metres, 

Number of oscillations/vibrations = 30 

Distance / Number of oscillations equals the wavelength. 

= 20 / 30 

λ = 0.66 ms-1

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