A doctor has a prescribed a corrective lens of power +1.5D.Find the focal length of the lens.Is the prescribed lens coverging or diverging.
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Answered by
13
Given P = + 1.5 D , F = 1
Using the relation
P = 1 / F. or F = 1 / P
F = 1 / 1.5
F = 100 / 15
66.7 cm.
The prescribed lens is converging or convex as it's power is positive..
Using the relation
P = 1 / F. or F = 1 / P
F = 1 / 1.5
F = 100 / 15
66.7 cm.
The prescribed lens is converging or convex as it's power is positive..
Answered by
3
Power of lens= 1/focal length
⇒ focal length = 1/power of lens
=1/1.5
=0.6667 m
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