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Two thin lenses of powers 2D and 3D are ...

Two thin lenses of powers `2D` and `3D` are placed in contact. An object is placed at a distance of 30 cm from the combination The distance in cm of the image from the combination is

A

30

B

40

C

50

D

60

Text Solution

Verified by Experts

The correct Answer is:
D
`p=p_(1) + p_(2), f=100/p, 1/f=1/v -1/u`
(Apply necessary sign convention)
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