Physics, asked by ishitaagrawal199, 10 months ago

find the focal length of combination lens formed by placing in contact two thin of lenses of power +2.5d and -2d

Answers

Answered by kuladipanegi0316

1

Answer: The focal length is 2m.

Explanation: power of combination = P1 + P2

=2.5 + (-2)

P comb = 0.5 D

f comb = 1/P comb

= 1/0.5

= 2m

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