CBSE Class 10 Answered
Two lens of power are -1.5 and 2.57 D are kept in contact . Find its focus?
Asked by Mohit RaAz | 14 Dec, 2014, 06:58: PM
Expert Answer
Given:
Power of first lens, P1 = -1.5 D
Power of second lens, P2 = 2.57 D
Therefore,
Power of combination, P = P1 + P2
= (-1.5 + 2.57) D
= 1.07 D
Now,
Focal length of combination, F =
F =
F = 0.934 m
Answered by Faiza Lambe | 14 Dec, 2014, 09:44: PM
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