CBSE Class 10 Answered
a concave lens of focal length 25 cm and a convex lens of focal length 20cm are placed in contact with each other. What is the power of this combination and also find the focal length of the combination?
each other. What is the power
Asked by tanujasai20 | 16 Jun, 2020, 06:55: PM
Expert Answer
The power of a lens is defined as the reciprocal of its focal length in metres.
P = 1/f (in metres)
Answered by Shiwani Sawant | 16 Jun, 2020, 07:52: PM
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