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Course: Class 10 Physics (India) - Hindi > Unit 1

Lesson 12: Dioptres & power of a lens (Hindi)
Science
Class 10 Physics (India) - Hindi
Light – reflection & refraction (Hindi)
Dioptres & power of a lens (Hindi)
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Power of lens

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Problem

Harry broke his pair of glasses in a Quidditch match, and sees an optician for a new pair. He's prescribed glasses that are convex lenses of focal length 40 cm each.
What is the power of Harry's glasses in units of dioptres (D)?
Choose 1 answer:
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Power of lens