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(i) If f = 0.5 m for a glass lens, what ...

(i) If f = 0.5 m for a glass lens, what is the power of the lens? (ii) The radii of curvature of the faces of a double convex lens are 10 cm and 15 cm. Its focal length is 12 cm. What is the refractive index of glass? (iii) A convex lens has 20 cm focal length in air. What is focal length in water? (Refractive index of air-water = 1.33, refractive index for air-glass = 1.5.)

A

`+5` D

B

`+2` D

C

`-5` D

D

`-2` D

Text Solution

Verified by Experts

The correct Answer is:
B
`+2` D
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