Question

calculate the wave no. of radiation having a frequency of 4× 10^14 hrtz

Answer 1

Wave Number = 1/ Wavelength

But wavelength = speed of light / frequency

So Wave Number = Frequency / Speed of Light

= 4 X 1014/3 X 108

Wave number = 1.33 X 106  m-1

hope it helps you. . . . . . . mark as a brainlist. . . . . follow me. . . . . .