Question

a person needs a lens of power 5.5 diameters of current in his distance vision
for correcting his near vision he needs a lens for power plus+ 1.5 diopter
what is the focal length of the lens required for correcting
1) distant vision 2) near vision​

Answer 1

Explanation:

thus the focal length of lens required for correcing distant vision is, - 18.2 cm. Minus sign of focal length tells us that it is a concave lens. Thus the focal length of lens required for required for correcting near vision is +66.7 cm Plus sign of focal length tells us that it is a convex lens.

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Answer 2

Answer:

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