Question

The frequency of wave is 120hz and its velocity is 480m/s. what will be the value of its wave length?​

Answer 1

4 m.

• The frequency of a repeated event is the number of instances per unit of time. It is the quantity of waves that occur in a unit of time for a wave. It is expressed in hertz (Hz) units, where one hertz (Hz) is equal to one repetition of a wave or event every second. A wave signal's wavelength is defined as the separation between two identical points (adjacent crests or troughs) in adjacent cycles. The spatial frequency of a wave, expressed in cycles per unit distance or radians per unit distance, is known as the wave number. Wavenumber is the quantity of waves per unit distance, whereas frequency is the number of waves per unit of time.

Here, according to the given information, we are given that,

The frequency of wave is 120hz and its velocity is 480m/s.

This means that, v = 480m/s and f = 120hz.

Now, we know that,

$wavelength = \frac{v}{f}$

Or, Wavelength = $\frac{480}{120}= 4$ m.

Hence, wavelength = 4m.

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