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A gamma-ray photon is passing near a nuc...

A `gamma`-ray photon is passing near a nucleus and breaks into an electron and positron. The region contains a uniform magnetic field B perpendicular to the plane of motion. Find the time after which they again converted into `gamma`-ray. The force of electrostatic interaction and gravitational interaction may be neglected

A

`(2pim)/(eB)`

B

`(pim)/(2qB)`

C

`(4pim)/(eB)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
a
Both position and electron are moving on circular paths.
`:. T=(2pim)/(qB)`
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