Question

a laser emits light of frequency 4.7 x 10¹⁴ sec-1. What is the wavelenght of the light in nm? Inanometer (nm) = 1 x 10 -⁹ m

Answer 1

Answer

light of frequency f=4.7 x 10¹⁴ sec-1.

So

wavelength of the light

$\lambda=\frac{c}{f}\\=\frac{3\times10^{8}}{4.7\times10^{14}}\\=638.3nm$