Question

Object is placed in front of a convex mirror of radius of curvature is 40 cm. The magnification is found to be ¼, find the location of the object?

Answer 1

Answer:

u=-10cm R=-40cm

Then f=R/2=-20cm

From the mirror formula 1/v=1/f-1/u

-1/20+1/10=1/20

V=20cm so v is positive

Hence a virtual and erect image will be formed on the other side of the object, i.e behind the mirror.

M=-v/u=-20/-10=2

Magnification of mirror is 2