Physics, asked by Rano38, 5 days ago

Two thin lenses, one of focal length +60 cm and the other of focal length -20 cm are kept in contact. The power of the combination is
(a) - 5 D
(b) + 2 D
(c) - 3 D
(d) + 3 D

Answers

Answered by momdjskmom1259

2

first i converted cm into m them answer is 3

Answered by akicherry458

2

Answer:

+3

Explanation:

please make me a brainlest

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