The momentum of a photon having energy equal to the rest energy of an electron is
Zero
2.7×10−22kgms−1
1.99×10−24kgms−1
∞
A
∞
B
2.7×10−22kgms−1
C
1.99×10−24kgms−1
D
Zero
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Solution
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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=2.7×10−22
So, the answer is option (B).
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