Question

Anil was advised to use spectacles of lens having negative focal length. Explain why.

Answer 1

Answer:

As power is +2D, therefore focal length is =

P

1

which is +

2

1

m=+50cm so, focal length is positive which is for convex lens and a convex lens is used for correction of hypermetropia. So, the person is suffering from hypermetropia, hence correct option is A.

Explanation:

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