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The radius of curvature of each surface ...

The radius of curvature of each surface of a biconcave lens made up of glass of refrative indx `1.5` is 30 cm. the focal length of the lens is

A

60 cm

B

30 cm

C

`-30 cm`

D

`-60 cm`

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TARGET PUBLICATION-OPTICS-EXERCISE
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  2. A concave lens has radioi of curvatures of 20 cm and 30 cm respective...

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  3. The radius of curvature of each surface of a biconcave lens made up of...

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  4. A single lens, which will form the image of a given object at the same...

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  7. Two thin converging lenses of focal length 15 cm and 30 cm are held i...

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  8. What is the focal of the combination of a convex lens of focal length...

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  9. Two thin lenses, aone convex of focal length 10 cm and other concave l...

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  15. The rectangular face opposite to the refracting edge is called .

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  16. The refractivity of the material of the prism is given by

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  18. As the refractive index of the material of prism for different colours...

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