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The refractive index of a medium is 1.8....

The refractive index of a medium is 1.8. A bubble lies in this medium at an apparent depth of 10 cm. The real depth of the bubble is

A

`10/1.8`cm

B

18 cm

C

12cm

D

9cm

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The correct Answer is:
B
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BINA LIBRARY-Optics-I-EXERCISE
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  2. What is the speed of light in glass of refractive index 1.5 if the vel...

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  3. The refractive index of a medium is 1.8. A bubble lies in this medium ...

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  4. When light travels from glass to air, there is no change in its

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  5. The lateral shift produced in a parallel sided glass slab depends on

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  6. What is optical fibres? What principle is used in it?

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  7. The refractive index of an equilateral prism is 'sq.root 3' . What is ...

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  8. The minimum distance between an object and its real image is

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  9. Critical angle of light passing from glass to air is minimum for

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  10. The critical angle for a medium is 60°. Then the refractive index of t...

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  11. In which of the following cases total internal reflection can not be o...

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  12. The distance between the object and its real image formed by a convex ...

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  13. The focal length of a lens depends upon

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  14. A contact combination is made of a thin convex lens (f = 9 cm) and a t...

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  15. Two thin lenses of focal length 20 cm and 25 cm are placed in contact....

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  16. A lens behaves as a converging lens in air and a diverging lens in wat...

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  17. An eye has a defect of myopia if it does not see

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  18. For removal of hypermetropia, one should use

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  19. On increasing the tube-length of a compound microscope its magnifying ...

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  20. A sharp image is observed through a compound microscope. Now if the ey...

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