Question

Calculate the wavelength of radiation emitted with a frequency of $1.2\times {10}^3$ hz. $[c=3\times {10}^{8}m{s}^{-1}$]

Answer 1

$v=1.2\times {10}^3$ Hz

$e=3\times {10}^8$ m/s

$\lambda =\frac{e}{v}=\frac{3\times {10}^8}{1.2\times {10}^3}$

$\lambda =2.5\times {10}^5$.