Question

calculate wave number of radiation having frequency of 4x10^11kHz​

Answer 1

$\huge\mathfrak\red{Answer :) }$

Frequency(v)= velocity of light (c)/wavelength

wavelength=velocity/frequency

given frequency is 4x10^14hz

velocity = 3x10^8m/s

so wavelength = 3x10^8/4x10^14

= 0.75x10^-6 m

so wavelength=0.75x10^-6m

Answer 2

I hope its helpfull to u mate may god bless you