Question

Find the position of the object when an image is formed in front of a mirror on a screen at a distance of 30cm from the mirror. The focal length of the mirror is 10cm. Calculate magnification​

Answer 1

Explanation:

Correct option is

C

x

f

In a spherical mirror,

u

1

+

v

1

=

f

1

Multiply both sides by u

1+

v

u

=

f

u

or

v

u

=

f

u

−1

Here, u=−(x+f),f=−f

∴

v

u

=

−f

−(x+f)

−1=

f

x

+1−1=

f

x

m=

u

v

=

x

f

.