Question

The image of object formed by mirror is real, inverted and is of magnification -1. If image is at distance of 30 cm from mirror then find
1. Radius of curvature of mirror
2. Position of image if object is moved 15 cm towards mirror,also find nature of image obtained

Answer 1

(1) m=-1 (concave mirror)

Therefore,the image size=object

size(at C)

R=-30cm

(2) u=-15cm

R=2f

f=-15

v=?

1/v=1/f-1/u

=-1/15+1/15

=0

The image is formed at infinity since it is placed at focal length

Answer 2

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