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In an experiment to find focal length of...

In an experiment to find focal length of a concave mirror a graph is drawn. The graph looks like ...........

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
For concave mirror
object distance u, image distance v and focal length f
`u=(alpha)` when v=f
u=2f(object on centre of curvature)
v=2f
and when u=f then v=`infty` (infinite)
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Knowledge Check

  • Focal length of plane mirror is ......

    A
    zero
    B
    infinite
    C
    1
    D
    same as of radius of curvature

  • Radius of curvature of a concave mirror is 20 cm, then its focal length is ...... cm.

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