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Class 10 Physics (India) - Hindi

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

Lesson 12: Dioptres & power of a lens (Hindi)

Power of lens (Hindi)
Power of lens

Power of lens

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, space, start text, c, m, end text each.

What is the power of Harry's glasses in units of dioptres (start text, D, end text)?

(Choice A)
minus, 2, point, 5, space, start text, D, end text
(Choice B)
plus, 0, point, 025, space, start text, D, end text
(Choice C)
plus, 2, point, 5, space, start text, D, end text
(Choice D)
plus, 0, point, 40, space, start text, D, end text

Stuck?

Class 10 Physics (India) - Hindi

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

Problem