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An x-ray photon collides with a free electron, and the photon is scattered.
During this collision there is conservation of:
a) momentum but not energy
b) neither momentum nor energy
c) energy but not momentum
d) both momentum and energy
Ans- Both momentum and energy
When a person stands on a scale in an elevator at rest, the scale reads 800 newtons. When the elevator is allowed to fall freely with acceleration of gravity, the scale reads o
write a short note on terrestrial telescope
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