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0 votes
5.8k views
in Physics by (79.0k points)

Two lens of focal lengths -20 cm and +10 cm are put in combination, find the power of the combination

(a)  - 1 D

(b)  - 2 D

(c)  + 5 D

(d)   + 2 D

1 Answer

+1 vote
by (50.7k points)
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Best answer

Correct option  (c)  + 5 D

Explanation:

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