A person having myopic eye uses a concave lens of focal length 50cm.
What is the power of the lens?

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Solution

So focal length = - 50 cm = - 0.50 meter

power = - 1/0.50 = -2 Dioptre or - 2 D

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A person having myopic eye uses a concave lens of focal length 50cm. What is the power of the lens?

So focal length = - 50 cm = - 0.50 meter power = - 1/0.50 = -2 Dioptre or - 2 D

A person having myopic eye uses a concave lens of focal length 50cm.
What is the power of the lens?

So focal length = - 50 cm = - 0.50 meter

power = - 1/0.50 = -2 Dioptre or - 2 D