A light wave has a frequency of 2 x 108. What is the wavelength of the light wave?

(Assume the speed of light to be 3 x 108.)

Your Answer:

Answer: 1.5metres

Explanation:

Given that:

Wavelength (λ) = ?

Frequency F = 2 x 10^8Hz

Speed of light V = 3 x 10^8 m/s

The wavelength is the distance covered by the wave in one complete cycle, and represented by the symbol λ.

So, apply V = F λ

3 x 10^8 = 2 x 10^8 x λ

λ = (3 x 10^8 ➗ 2 x 10^8)

= 1.5 m

Thus, the wavelength of the light wave is 1.5 metres