The energy of a photon, whose momentum is 10 MeV/c, where c is the spe

The energy of a photon, whose momentum is 10 MeV/c, where c is the speed of light, is given by

10 MeV

100 MeV

1 MeV

0·1 MeV

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This question was previously asked in

UPSC CDS-2 – 2016

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For a photon, which is a massless particle, the relationship between energy (E) and momentum (p) is given by the equation E = pc, where c is the speed of light. Given the momentum p = 10 MeV/c, the energy E is calculated by multiplying the momentum by c.

The energy (E) and momentum (p) of a photon are related by the formula E = pc.

In this calculation, the unit of momentum is given in a form (MeV/c) that directly leads to the energy unit (MeV) when multiplied by c. The MeV unit (Mega-electron Volt) is a unit of energy commonly used in particle physics. 1 MeV = 1.602 x 10⁻¹³ Joules.

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