The power of a convex lens of focal length 25 cm is 1)+4.0D. 2)0.25D. 3)-4.0D. d)-0.4D.
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answer is 1
as first convert focal length into metres
it comes to be 25/100
Power = 1/focal length = 100/25 = +4.0D
as first convert focal length into metres
it comes to be 25/100
Power = 1/focal length = 100/25 = +4.0D
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0
Answer:
Explanation:
+4.0 D
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