Question

10. An object is placed at a distance of 48 cm in front of a concave mirror of focal length 24cm.
(a) Find the position of the image
(b) what will be the nature of the image?
class 10 physics

Answer 1

Answer:

Given f=24 cm (negative)

u=48cm (negative)

a. From relation 1/u+1/v=1/f

1/v =1/f -1/u=1/(-24)-1/(-48)

or 1/v = -2+1/48 = -1/48 or v=-48

Algernative: The object is at the centre of curvature of concave mirror, so image will form on itself i.e., at distance 4 cm in front of mirror.

b. The image is at a distance 48 cm in front of mirror.

The image is inverted, real and of same size as object.