A convex lens of focal length 2.5 m is used for experimental purposes What is the power of this lens?
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Answer:
+0.004D
Explanation:
focal length = 2.5 cm
focal length = 2.5*100 m
focal length = 250m
now
power = 1/f(in m)
power = 1/250
power = +0.004D
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