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A plano-convex lens fits exactly into pl...

A plano-convex lens fits exactly into plano-concave lens as shown in the figure. Their plane surfaces are parallel to each other. If the lenses are made of different materials of refractive indices 1.6 and 1.5 respectively, if R is the radius of curvature of curved surface of lenses, then the focal length of the combination

A

`frac(R)(6.2)`

B

`frac(R) (0.2)`

C

`frac(R)(3.1)`

D

`frac(R)(0.1)`

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TARGET PUBLICATION-OPTICS-EXERCISE
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  2. A plnao=convex lens fits exactly into a plano-concave lens. Their plan...

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  3. A plano-convex lens fits exactly into plano-concave lens as shown in t...

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  4. A comvex lens and a concave lens are placed in contact. The ratio of m...

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  6. Two identical equiconvex lenses, each of focal length 'f' are placed s...

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  14. A ray of light is incident at an angle of 60^(@) on the face of a pris...

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  15. In an experiment for determination of refractive index of glass of a p...

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  17. Angle of minimum deviation for a prism of refactive index 1.5, is equa...

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  18. A ray of light suffers a minimum deviation when incident on an equilat...

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