Math, asked by styrene1, 10 months ago

Two thin lenses of focal lengths 10 cm and 20 cm are placed in contact. The effective power of
combination is
(1) 1/15 D
(2) 15 D
(3) 1/30 D
(4) 30 D

Answers

Answered by sajanasubba41

1

Answer:

I think option 3

Step-by-step explanation:

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