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Manipal MET2015PhysicsDual Nature of Matter

Out of a photon and an electron, the equation E=P C , is valid for

Options

  1. Aboth
  2. Bneither
  3. Cphoton only
  4. Delectron only

Correct answer

C. photon only

Step-by-step solution

Energy is given by E= m₀ c^2 1- v^2 c^2 E^2= m₀^2 c^6 c^2-v^2 Momentum P is given by P= m₀ v 1- ( v^2 c^2 ) P^2 c^2= m₀^2 c^4 v^2 c^2-v^2 aligned & & E^2-P^2 c^2 & =m₀^2 c^4 & & E^2 & =P^2 c^2+m₀^2 c^4 aligned For photon, rest mass m₀=0, so E=P c For electron, m₀ 0 , so E P c

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