Question

Calculate the momentum of a photon of light of wavelength 500 nm

Answer 1

Given
$\lambda =h/p$
$\Rightarrow P=h/\lambda =$ $\frac{6.63\times {10}^{-34}}{500\times {10}^{-9}}J-S=1.326\times {10}^{-27}=1.33\times {10}^{-27}kg-m/s.$