Question

The image of an object placed at 40.0 cm from a concave spherical mirror and its image is formed
on object itself. Find :
(1) focal length of mirror.
(ii) linear magnification​

Answer 1

Answer:

i) f = infinite

ii) m = 1

Explanation:

i)  1/f = 1/v +1/u

1/f = 1/40 - 1/40

f = 1/0 = infinity

ii)  m = - v/u

       = 40 /40  = 1