A short linear object, of length l, lies along the axis of a concave mirror, of focal length f, at a distance d from the pole of the mirror. The size of the image is then (nearly)
A
$\frac{lf}{d-f}$
B
$\frac{d-f}{lf}$
C
$l\frac{f^2}{(d-f)^2}$
D
$\frac{(d-f)^2}{f^2}l$

Question

A short linear object, of length l, lies along the axis of a concave mirror, of focal length f, at a distance d from the pole of the mirror. The size of the image is then (nearly)

Accepted Answer

$$l\frac{f^2}{(d-f)^2}$$

Answer

$$\frac{lf}{d-f}$$

Answer

$$\frac{d-f}{lf}$$

Answer

$$\frac{(d-f)^2}{f^2}l$$

AIIMS 2009 Physics Mirrors MCQ Question

Correct Answer

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