2016 · Q38
The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by
General KnowledgePhysics
- A10 MeV
- B100 MeV
- C1 MeV
- D0.1 MeV
Explanation
For a photon, energy and momentum are related by E = pc. With p = 10 MeV/c, the energy is E = 10 MeV/c × c = 10 MeV. The other values (100, 1, 0.1 MeV) follow from misapplying the formula.