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Question

The momentum of a photon having energy equal to the rest energy of an electron is

A
Zero
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B
2.7×1022kgms1
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C
1.99×1024kgms1
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D
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Solution

The correct option is B 2.7×1022kgms1
Momentum of a particle having rest mass energy zero like photon is given by:
E=pc, where p is the momentum and c is the speed of the photon.
So, p=E/c=m0c2c=m0c=2.7×1022
So, the answer is option (B).

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