Question

A doctor has prescribed a corrective lens of power +1.5 D. Find the focal length of the lens.​

Answer 1

Answer:

Using P=100/f

f=100/p

f=100/1.5

=1000/15= 66.67m

As the focal length is positive, it is convex lens.

Hence, It is a converging lens.

Explanation:

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Answer 2

Answer:66.67 m

Explanation:

Using P= 1/f

⇒ P = 100/f

f=100/p

f=100/+1.5

=1000/15= 66.67m

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