Question

Aniket from 10th std uses spectacles the power of the lens of spectacles is -0.5D state the types of lenses

Answer 1

f=1/d
f=1/-0.5
=-2
she is using concave lenses.

Answer 2

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The type of the lenses used in his spectacles is

concave lens as the power of the lens is negative.

Hope it helps!

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