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in Physics by (83.4k points)

Whenever a stream of electrons collides with a stream of photons, in this collision, which of the following is not conserved? 

(a) Linear momentum 

(b) Total energy 

(c) No. of photons 

(d) No. of electrons 

1 Answer

+1 vote
by (70.1k points)
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Best answer

The correct option is (c) No. of photons.

Explanation:

In a photon-particle collision (such as photon-electron), the total energy and total momentum are conserved. However, the number of photons may not be conserved in a collision. The photon may be absorbed or a new'photon may be created.

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