Question

What is the frequency of a wave of intrared light which has a wavelength of 4.35 * 10 ^ - 5 meters?

Answer 1

6.9 x 10¹²Hz

Step-by-step explanation:

Given parameters:

Wavelength of the wave = 4.35 x 10⁻⁵m

Unknown:

Frequency of the wave = ?

Solution:

The speed of a wave is related to the wavelength and frequency using the expression below;

C = Fλ

C is the speed of light = 3 x 10⁸m/s

F is the frequency

λ is the wavelength

Insert the given parameters and solve;

3 x 10⁸ = F x 4.35 x 10⁻⁵

F =
`(3 x 10^(8) )/(4.35 x 10^(-5) )` = 6.9 x 10¹²Hz