Question

Calculate the momentum of a photon having an energy of 4.8 × 10⁻¹⁹ J.

Answer 1

Given: E = 4.8 × 10⁻¹⁹ J

For a photon, which is a massless particle, the relationship between its energy (E) and momentum (p) is governed by the equation:

E = pc

∴ p = `E/c`

= `(4.8 xx 10^-19)/(3 xx 10^8)`

= 1.60 × 10⁻²⁷ kg. m/s