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Lens Maker's Formula

The radius of...

Question

The radius of curvature for a convex lens is 40 cm, for each surface. Its refractive index is 1.5. The focal length will be

[MP PMT 1989]

A

40 cm

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B

20 cm

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C

80 cm

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D

30 cm

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Solution

The correct option is A 40 cm

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