Question

The image of an object placed at a distance of 36cmfrom the pole of the mirror on its principal axis is formed at the place of object,find the focal length of the mirror and linear magnification of the image.

Answer 1

Answer:

In case of a concave mirror,

When the object is at the centre of curvature the image is also at the centre of curvature. So Radius of curvature (R) =36 cm

N focal length is half of radius of curvature. Therfore f=18 cm

U=30cm (negative)

V=30 cm (negative)

Linear Magnification =-v/u = - (-36)/(-36)=-1