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Ncert solutions

CHAPTERS

A doctor has prescribed a corrective lens of power +2 D. What is the focal length of the lens?

(Hint: Power of lens (P) = 1/f )

Power of lens (P) = 1/f

P = 1.5D

f = 1/2 = 0.5 m

A convex lens has a positive focal length. Therefore, it is a convex lens or a converging lens.

A doctor has prescribed a corrective lens of power +2 D. What is the focal length of the lens?

(Hint: Power of lens (P) = 1/f )

Power of lens (P) = 1/f

P = 1.5D

f = 1/2 = 0.5 m

A convex lens has a positive focal length. Therefore, it is a convex lens or a converging lens.

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