Question

Calculate the wavelength, frequency and wave number of a light wave whose period is 2.010-10 s. (velocity of light, c = 3108 ms-1).

Answer 1

 Calculate the wavelength, frequency and wave number of a light wave whose period is 2.0 × 10–10 s. Answer. Given period = 2.0 x 10-10s. We know, Frequency (ν) of light ,therefore putting the values .we get. We also know. Where,c = velocity of light in vacuum = 3×108 m/s. Substituting ... of λ, we get. Wave number of light.