Question

What is the frequency of a photon if the energy is 7.27 x 10^-19 J? (h=6.626 x 10^-34 J x s)

Answer 1

$E=hν$

$ν=\frac{E}{v}=\frac{7.27\times10^{-19} J}{6.626\times10^{-34} J\times s}= 1.00\times10^{15} s^{-1}$