(i) Energy (E) of a photon is given by the expression,
E = hv
Where,
h = Planck‘s constant = 6.626 × 10–34Js ν = frequency of light = 3 × 1015 Hz Substituting the values in the given expression of E:
E = (6.626 × 10–34) (3 × 1015) E = 1.988 × 10–18J
(ii) Energy (E) of a photon having wavelength (λ)is given by the expression,
E = hc/λ
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: