calculate the rest mass relativistic mass and momentum of a photon of energy 5ev
Answers
Answered by
1
Answer:
The energy is only due to momentum, and not due to rest mass. It depends on the frequency because p=ℏk.
Answered by
3
Given:
energy of photon = 5ev
To find:
the rest mass relativistic mass
Explanation:
Energy of photon
E = 5eV
= 5 × 1.6×10⁻¹⁹ J
= 8.0×10⁻¹⁹ J
Momentum of Photon,
p = E/c =8.0×10⁻¹⁹ J/ 3×10⁸
= 2.67 ×10⁻²⁷ kg ms⁻¹
The relative mass of photos
m = P/c = 2.67 ×10⁻²⁷ / 3×10⁸
= 8.9×10⁻³⁶ kg
According to the variation of relativistic mass with velocity
m = [m₀/√1 - (v²/c²)]
The velocity of photon, v = c
rest mass of photon, m₀ = 0.
Answer = 8.9×10⁻³⁶ kg
Similar questions