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Question
A doctor has prescribed a corrective lens of power+1.5 doctor. Find the focal length
(a) is the prescribed lens diverging or converging
A doctor has prescribed a corrective lens of power+1.5 doctor. Find the focal length
(a) is the prescribed lens diverging or converging
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Solution
We have, Power = +1.5 D
We know,
Power = 100/f
or, 1.5 = 100/f
or, f = 100/1.5 = 66.6
The focal length of the lens = 66.6 cm
The prescribed lens is converging.
We have, Power = +1.5 D
We know,
Power = 100/f
or, 1.5 = 100/f
or, f = 100/1.5 = 66.6
The focal length of the lens = 66.6 cm
The prescribed lens is converging.
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