Physics, asked by imsidhra09, 7 months ago

doctor advised to use -4d lens. find the focal length of lens in cm and also in metre. what can you infer about the nature of lens?

Answers

Answered by doddinishanth7

1

Explanation:

power= -4D

power =1/focal length

=1/-4

= -0.25m

this lens is concave lens

Answered by deve11

4

Explanation:

Given: P=-4 D.

F=1/P

F=1/-4=0.25m or 25cm

The (-) sign indicates that it is a concave lens.

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