Question

An object of size 7.0 cm is placed at 27 cm in front of a concave mirror of focal length 18 cm. At what

distance from the mirror should a screen be placed, so that a sharp focused image can be obtained? Find the

size and nature of the image.​

Answer 1

Refer to the attached file.

:)

Answer 2

Answer:v=-56,m=-2.07 ie image is real and inverted

Explanation:

1/v+1/u=1/f (mirror formula)

1/v-1/27=-1/18

Solving this we get v=-56cm

m=-v/u,so 56/-27 =-2.07

As m is negative so image is real and inverted.