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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

15 cm

B

20 cm

C

25 cm

D

30 cm

Text Solution

Verified by Experts

The correct Answer is:
4
`(1)/(v)-(1)/(u)=(1)/(f)`
`(1)/(v)-(1)/(-15)=(1)/(10)`
`or(1)/(v)=-(1)/(15)+(1)/(10)`
`or(1)/(v)=(-2+3)/(30)`
or v = 30 cm
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