Q-5 The power of a lens is 5D. Find its focal length in metres.
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Answered by
2
Answer:
The power of the lens is the reciprocal of the focal length of the lens. This is the focal length of the convex lens. Hence, The focal length of the lens is 20cm
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0
Answer:
20cm
Explanation:
p=1/f
p=5d , 1m= 100cm
5=100/f
f=20cm
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