Question

Number of wavelengths per unit length called as

Answer 1

it is called as wave number

Answer 2

Answer:

Number of wavelengths per unit length called as Wave Number.

Explanation:

Number of wavelengths per unit length called as Wave Number.

We know that the wavelength is the length between two consecutive crest or trough of the sinusoidal waves.

$Speed=\dfrac{Distance}{Time}$

$v=\dfrac{\lambda}{T}$

Where $\lambda$ is the wavelength.

Wave Number is represented by K.Generally it is the reciprocal of wavelength.

$K=\dfrac{1}{\lambda}$.

The S.I unit of wave number is meter inverse($m^{-1}$) or centimeter inverse($cm^{-1}$).