Question

A convex lens of focal length 12 cm forms an image ,which is three times bigger than the object. find the distance between the object and the lens , if the image formed is real.​

Answer 1

Answer:

v

1

−

u

1

=

12

1

uv

u−v

=

12

1

-(1)

m=

u

−v

=3

v=−3u

using equation (1)

−u×3u

u+3u

=

12

1

u=−16cm

∴v = 48 cm

So u−v= 64 cm

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