Question

The near point of Hypermetropic eye is 100cm from the eye. What is the power

of the lens which he requires to read clearly a book held at 25cm from the eye?

(3)

25 The far point of a person is 2m. Find the power and focal length of the lens

required to rectify this problem. ​

Answer 1

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☆$\small\green {\sf{Answer }}$☆

The convex lens required to correct hypermetropic

U=-25

V= - 1m= - 100cm

Using lens formula: 1/f=1/v-1/u

1/f = - 1/100-1/-25

=-1/100+1/25

= - 1+4/100

= - 3/100cm^-1

Power:: p=1/f

= 3/100*100D

P= 3D....

Answer 2

Answer:

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