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A lens made of material of Refractive in...

A lens made of material of Refractive index `mu_(2)` is surrounded by a medium of Refractive Index `mu_(1)`. The focal length f is related as

A

`f prop (mu_(2) - mu_(1))`

B

`f propmu_ (1)/((mu_(2)-mu_(1)))`

C

`f prop (mu_(2) + mu_(1))`

D

`f prop (1)/((mu_(2)+mu_(1)))`

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-RAY OPTICS AND OPTICAL INSTRUMENTS-Assignment (Section - A) Objective Type Questions (One option is correct)
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  2. Three lenses in contact have a combined focal length of 12 cm. When th...

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  3. A lens made of material of Refractive index mu(2) is surrounded by a m...

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  4. The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...

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  5. For a plano convex lens, the radius of curvature of convex surface is ...

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  6. A convex glass lens (mu(g) = 1.5) has a focal length of 8 cm when plac...

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  7. A light ray is incident normally on one of the refracting faces of a p...

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  8. If a light ray incidents normally on one of the faces of the prism of ...

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  9. A ray of light is incident on one of the faces of the angle prism with...

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  10. A prism of refractive index sqrt(2) has a refracting angle of 60^(@). ...

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  11. The least angle of deviation for a glass prism is equal to its refract...

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  12. A light ray of angles of incidence 40^(@) emerged from the prism in mi...

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  13. The angle of minimum deviation for a 75^(@) prism of dense glass is fo...

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  14. Suppose a small angled prism of 6^(@) deviates a ray through 3^(@), th...

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  15. A crown glass prism of angle of 5^@ is to be combined with a flint gla...

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  16. A thin prism of angle 6^(@) made up of glass of refractive index 1.5 i...

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  17. Compare the dispersive powers of two prisms if one of them deviates th...

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  18. A convex mirror forms an image one-fourth the size of the object. If o...

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  19. A microscope is focussed on the scratch at the bottom of a beaker. Wat...

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  20. While a moving picture is being screened, a boy introduced a glass sla...

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