Question

The magnification of the image formed by the sperical mirror is -1.25.if object size is 2cm,then find size of the image?

Answer 1

Answer:

u=−20

f=−15

We know

f

1

=

v

1

+

u

1

−15

1

=

v

1

+

−20

1

v=−60cm

Now the magnification m=−

u

v

=−3

Height of object h=1cm

Height of image h

1

=∣m∣×h=3×1=3cm