Question

The radius of curvature of a concave mirror is24cm and image is magnified by 1.5 times. What is the object distance

Answer 1

Answer:20cm

Explanation:

given that

R=24 cm

f=R/2=24/2=12 cm

and m= -v/u = -3/2........(1)

v=3/2 u .............(2)

from mirror equation,

1/v+1/u=1/f................(3)

putting the value of f and v in equation (3) we get,

2/3u+1/u=1/12

3u=60

u=20 cm

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