Question

An object is placed 30cm infront of a concave mirror of focal length 10cm. Calculate the distance of its image

Answer 1

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Answer 2

Hello mate..

Question:

An object is placed 30cm infront of a concave mirror of focal length 10cm. Calculate the distance of its image.

Answer:

Given,

$f = - 10cm. \\ u = - 30cm. \\ v = \: ?$

Solution:

$\frac{1}{f} = \frac{1}{u} + \frac{1}{v} \\ - \frac{1}{10} = \frac{1}{ - 30} + \frac{1}{v} \\ - \frac {1}{10} + \frac{1}{30} = \frac{1}{v}$

$\frac{ - 3+ 1}{30} = \frac{1}{v} \\ - \frac { 2}{ 30} = \frac{ 1}{v} \\ \frac{1}{ - 15} = \frac{1}{v}$

$v = - 15$

Therefore, the distance of the image from the mirror is -15.

HOPE THIS HELPS YOU..