Physics, asked by bharatboy, 11 months ago

Two thin lenses of power+4D &-2D are in contact. What is the focal length of the combination

Answers

Answered by adya18

7

Power of the combination lens = +4D - 2D
= +2D
Now, Focal length = 1/Power of lens
= 1/2(+ve)
= 0.5(+ve)...

Answered by Anonymous

1

Power of lens=p1+p2

=4D+-2D

=2D

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