Physics, asked by cnidarian0, 15 hours ago

Two lenses of power 17.5 D and +2.75 D are placed in contact. the focal length of combination is _______ cm.

how to solve this?

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Answered by sujanavachu

0

Answer:

P1 _ -1.75 D

P2 _ +2.75 D

power of combination (P) = P1 + P2

1.75+2.75= 1D.

f= 1/D =1m = 100 cm.

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