Question

Most of the light form a sodium vapor lamp has a wavelength of 598nm. What is the frequency of this radiation?

Answer 1

Formula : Frequency = $\frac {C}{\lambda}$

here C = $3\times 10^8 m/s.$ and $\lambda = 598\times 10^-9 m$

Hence Frequency = $\frac {3\times 10^8}{598\times 10^-9}$ = $5.02\times 10^(14) Hz = 5.02\times 10$ ^(14) Hz. Answer.