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Mirror Formula and Magnification

The magnifica...

Question

The magnification produced by a mirror is $+ \frac{1}{3} .$ Then the mirror is a ____________.

A

Concave mirror

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B

Convex mirror

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C

Plane mirror

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D

plano convex mirror

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Solution

The correct option is D Convex mirror
The value of $m$ is less than $1$ . So it means the image is diminished.
$m = + \frac{1}{3}$
The positive sign indicates that the image is virtual and erect.

Hence, the mirror must be $c o n v e x$ mirror. Concave mirror also produces virtual image but it is enlarged. But convex mirror always produces diminished, virtual and erect image.

Answer-(B)

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