Question

Find energy of the photons which have wavelength of 0.50 A

Answer 1

(ii) Energy (E) of a photon having wavelength (λ) is given by the expression here,

h = Planck’s constant = 6.626 × 10–34 Js

c = velocity of light in vacuum = 3 × 108 m/s  

Substituting the values in the given expression of E:

 

E = 3.98 X 1015 J