Question

The focal length of the convex mirror is 40cm.A point source of light is kept at a distance

40cm. Find the distance of the image from the mirror?
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Answer 1

Answer:

40c.m is the answer......

Answer 2

Answer:

v = +20cm , behind the mirror

Explanation:

by using mirror formula,

1/f= 1/v + 1/u

1/40  =  1/v  +  1/-40

1/40  =  1/v   -  1/40

1/40  + 1/40  =  1/v

2/40  =  1/v

v   =   40/2

v  =  +20cm