Question

A convex lens of focal length 0.12m produces an image which is thrice the size of the object .Find the distance between the object and the lens.
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Answer 1

Explanation

ANSWER

From lens formula

=1v−u1f1

vu−1=fu

vu=fu+f

uv=u+ff

For a convex lens f = 0.12m and m=3 then find u

So ,  3=0.12+u0.12

0.36+3u=0.12

u=−0.08m

Answer 2

Explanation:

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Asked on December 27, 2019 by

Yuna Venkatraman

A convex lens of focal length 0.12 m produces a virtual n image which is thrice the size of the object. Find the distance between the object and the lens

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ANSWER

From lens formula

=

1v−

u

1

f

1

v

u

−1=

f

u

v

u

=

f

u+f

u

v

=

u+f

f

For a convex lens f = 0.12m and m=3 then find u

So , 3=

0.12+u

0.12

0.36+3u=0.12

u=−0.08m