1.

A person having miopic eyes uses a concave lens of 50 cm. Find its power?

Answer»

To FIND the power of the lens, ALWAYS convert focal length into METERS. As the focal length of concave lens is negative, we can use the formula:
Power (P) = 1/focal length in meters(f)
=-1/0.5
=-2 dioptre
Hope I helped you. GREAT DAY ahead!



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