Question

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of
the lens. Is the prescribed lens diverging or converging?​

Answer 1

Given,

 Power, P=1.5D

focal length in metres, f=P1

f=1.51m

f=32m

=32×100

f=66.7cm

The power is positive, lens is convex i.e., converging

Answer 2

Explanation:

As the power of the lens is (+ ve)

the lens is a converging lens

1/ +1.5 = 0.67

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