An object is placed at a distance $20$ cm from the pole of a convex mirror of focal length $20$ cm. The image is produced.

13.3

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Solution

The correct option is A $10$ cm
$u = - 20$ cm, f $= 20$ cm
From mirror formula
$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$
$\frac{1}{20} = \frac{1}{v} + \frac{1}{- 20}$
$\frac{1}{v} = \frac{1}{20} + \frac{1}{20}$
$\frac{1}{v} = \frac{2}{20} = v = 10$ cm.

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An object is placed at a distance 20cm from the pole of a convex mirror of focal length 20cm. The image is produced.

The correct option is A 10cmu=−20cm, f=20cmFrom mirror formula1f=1v+1u120=1v+1−201v=120+1201v=220=v=10cm.

An object is placed at a distance $20$ cm from the pole of a convex mirror of focal length $20$ cm. The image is produced.

The correct option is A $10$ cm
$u = - 20$ cm, f $= 20$ cm
From mirror formula
$\frac{1}{f} = \frac{1}{v} + \frac{1}{u}$
$\frac{1}{20} = \frac{1}{v} + \frac{1}{- 20}$
$\frac{1}{v} = \frac{1}{20} + \frac{1}{20}$
$\frac{1}{v} = \frac{2}{20} = v = 10$ cm.