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An object is put at a distance of 5cm fr...

An object is put at a distance of 5cm from the first focus of a convex lens of focal length 10cm. If a real image is formed, its distance from the lens will be

A

15cm

B

20cm

C

25cm

D

30cm

Text Solution

Verified by Experts

The correct Answer is:
d.
`(1)/(v)-(1)/(u)=-(1)/(f)`
`(1)/(v)-(1)/(-15)=(1)/(f)`
or `(1)/(v)-(1)/(15)=(1)/(10)` or `(1)/(v)=(-2+3)/(30)`
or `v=30cm`
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