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Which mirror should be used to obtain a ...

Which mirror should be used to obtain a parallel beam of light from a small lamp, placed in front of the mirror ?

A

convex

B

plane

C

concave

D

any one of the above

Text Solution

Verified by Experts

The correct Answer is:
C
For a concave mirror, If u = f, then `v= oo` .
Thus, we get a parallel beam of light, if the lamp is placed at F of a concave mirror.
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