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Question

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

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

A

Zero

B

2.73 × 10–22 kg ms–1

C

1.99 × 10–24 kg ms–1

D

Infinite

Answer

2.73 × 10–22 kg ms–1

Explanation

Solution

p = hλ\frac{h}{\lambda} = Ec\frac{E}{c} = mec2c\frac{m_{e}c^{2}}{c} = mec