Science, asked by manasi7126, 8 months ago

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

Answers

Answered by Anonymous
19

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Given,

Power of lens = +1.5D (D - dioptre)

Let the focal length be f.

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Power of lens = 1/focal length (in metres)

= 100/focal length (in centimetres)

\huge\mathbf\red{Solution 1 :}

1.5 = 100/f

=> f = 100/1.5

=> f = 1000/15

=> f = 66.67m

Focal Length = +66.67m

\huge\mathbf\red{Solution 2 :}

As,the focal length is positive, it is convex lens.So, the lens is convergent in nature.

The Prescribed Lens is Converging in nature.

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Answered by Anonymous
36

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Power of lens = +1.5D

So,

1.5 = 100/f

f = 100/1.5

f= 1000/15

f= 66.67m

Therefore,the prescribed lens is converging in nature.

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