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Focal length of an equiconvex lens is 20...

Focal length of an equiconvex lens is 20 cm. The refractive index of material of the lens is 1.5. Now one of the curved surface is silvered. At what distance from the lens an object is to be placed, so that image coincides with the object ?

A

10 cm

B

20 cm

C

30 cm

D

40 cm

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The correct Answer is:
A
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AAKASH INSTITUTE-RAY OPTICS AND OPTICAL INSTRUMENTS-Assignment (Section - B) Objective Type Questions (One option is correct)
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  9. Focal length of an equiconvex lens is 20 cm. The refractive index of m...

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  14. A plane mirror is placed horizontally inside water (mu=4/3). A ray fal...

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