Question

Aniket from Std. X uses spectacles. The power of the lenses in his spectacles
is -0.5 D.
Answer the following questions :
(a) State the type of lenses used in his spectacles.
(b) Name the defect of vision Aniket is suffering from.
(c) Find the focal length of the lenses used in his spectacles.

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Answer 1

Type of lens is concave.

The defect is myopia.

P=-0.5D

P=1/f

f=1/p

f=1/0.5

f=2m

$hope \: it \: helps$

Answer 2

(a) he is using concave lens

(b) Aniket is suffering from myopia

(c) power = 1/f = -0.5

-5/10 = 1/f

f= -10/5

f= -2 m

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