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What is the power of a convex lens lens whose focal length is 80 cm?

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प्रश्न

What is the power of a convex lens lens whose focal length is 80 cm? 

संख्यात्मक
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उत्तर

Power of a lens is given by: 
Power (P) `=1/f` 

∴ `p=1/(80xx10^2)=100/80=1.25 D`.

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पाठ 2: Refraction of Light - Exercise 7 [पृष्ठ १३१]

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लखमीर सिंह Physics [English] Class 10
पाठ 2 Refraction of Light
Exercise 7 | Q 12. | पृष्ठ १३१
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