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If an electron enters into a space betwe...

If an electron enters into a space between the plates capacitor at an angle `alpha` with the plates and leaves at an angle `beta` to the plates. The ratio of its kinetic energy while entering the capacitor to that while leaving will be

A

`[(cos alpha)/(cos beta)]^(2)`

B

`[(cos beta)/(cos alpha)]^(2)`

C

`[(sin alpha)/(sin beta)]^(2)`

D

`[(sin beta)/(sin alpha)]^(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
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