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A thin linear object of size 1mm is kept...

A thin linear object of size 1mm is kept along the principal axis of a convex lens of focal length 10cm. The object is at 15cm from the lens. The length of the image is:

A

1mm

B

4mm

C

2mm

D

8mm

Text Solution

Verified by Experts

The correct Answer is:
B

`1/10 =1/V-1/((-15))rArr v=+30 cm`
For small object `dv=(v^(2))/(u^(2))du(30/15)^(2) xx1=4 mm`
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