Question

Where should an object be placed so that it a concave mirror of focal length 50 cm forms its image at 25 cm.​

Answer 1

Explanation:

Follow the above steps

Answer 2

Answer:

Given:-

A Concave mirror with focal length 50 cm. and the image should be formed at 25 cm.

To find:-

Distance of object

Solution:-

As we know that,

Mirror Formula=  $\frac{1}{u}$ + $\frac{1}{v}$ = $\frac{1}{f}$  ----------(1)

putting the values in equation.(1)

-$\frac{1}{u}$ + (- $\frac{1}{25}$) = -$\frac{1}{50}$

so,  -$\frac{1}{u}$ = -$\frac{1}{50}$ + $\frac{1}{25}$

-$\frac{1}{u}$ = $\frac{2-1}{50}$

-$\frac{1}{u}$ = $\frac{1}{50}$

∴ u = -50

∴  the object is placed 50 cm. away from the mirror.

Above Solution is the Answer.