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The diagram below shows a spherical lens...

The diagram below shows a spherical lens in which the image obtained is highly magnified and has a power of 4.0 D. With reference to this answer the following questions:

If this lens is blackened at the lower half

A

The focal length would be halved

B

The focal length is doubled

C

The focal length remains unaffected

D

The focal length is `1//4th`

Text Solution

Verified by Experts

The correct Answer is:
C
Focal length is independent of blackness of the lens
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