Question

The frequency of a wave is 6×10^15 /s. Its wave number would be

Answer 1

Explanation:

Given:

Period, T = 2.0 × 10–10 s

Frequency, v = [1] / T

= [1] / [2.0 × 10–10]

= 5.0 × 109 Hz

We know the following basic relation,

Speed of Light = [Frequency] × [Wavelength]

We know speed of light = 3×108 m/s

Wavelength, λ = [3×108] / [5.0 × 109]

= 0.06 m

Wave Number = [1] / [λ]

= [1/0.06]

= 16. 667 m-1

Therefore, the frequency of wave is 5.0 × 109 Hz and its wavelength is 0.06 m and its wave number 16. 667 m-1