Question

An object is placed at 60 cm from convex mirror of radius of curvature 40 cm. Find the position, nature and magnification of the image.

Answer 1

Explanation:

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