Question

What is the energy of a photon of red light that has a frequency of 4.48x105 GHz?

Answer 1

Answer:

The energy of a photon with frequency 4.48×10⁵ GHz is 2.97×10⁻¹⁹ Joules.

Explanation:

Given,

frequency of light = 4.48×10⁵ GHz

⇒                           =  4.48×10⁵×10⁹Hz = 4.48×10¹⁴Hz

The energy associated with a photon is given by,

             E = hν

                     where,

                          h = Planck's constant= 6.626×10⁻³⁴Js

                          ν = frequency of the radiation

substituting values of h and ν,

      E =  6.626×10⁻³⁴ ×  4.48×10¹⁴

⇒       = 2.97×10⁻¹⁹ J

Hence, the energy of a photon is 2.97×10⁻¹⁹ Joules.