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A layer of oil 3 cm thick is floating on...

A layer of oil 3 cm thick is floating on a layer of coloured water 5 cm thick. Refractive index of coloured water is `5//3` and the apparent depth of the two liquids appears to be `36//7`cm. Find the refractive index of oil.

A

`7/4`

B

`5/4`

C

`7/5`

D

`5/3`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-GEOMETRICAL OPTICS-ADDITIONAL PRACTICE EXERCISE -I (LEVEL-II LECTURE SHEET (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  2. A transparent cube of 15 cm edge contains a small air bubble. Its appa...

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  3. A layer of oil 3 cm thick is floating on a layer of coloured water 5 c...

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  4. A fish rising vertically to the surface of water in a lake uniformly a...

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  5. A ray of light is incident normally on one of the faces of a prism of ...

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  6. A man in an empty swimming pool has a telescope focussed at 4o'clock s...

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  7. A ray of light is incident on one face of a transparent slab of thickn...

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  8. A person looking through a telescope focuses lens at a point on the ed...

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  9. A rod of glass (mu=1.5) and of square cross section is bent into the s...

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  10. A light ray is incident at an angle of incedence (pi//4). The graph of...

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  11. Light is incident from glass (mu = 1.50) to water (mu = 1.33) find th...

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  12. A ray of light is incident at an angle of 75^(@) into a medium having ...

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  13. A beam of parallel rays of width b cm propagates in glass at an angle ...

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  14. A small object of height 0.5 cm is placed in front of a convex surface...

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  15. A ball is kept at a height h above the surface of a heavy transparent ...

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  16. A ring of radius 1cm is placed 1m in front of a spherical glass ball...

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  17. The radii of curvature of two spherical surfaces of a concave convex l...

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  18. A light ray travelling parallel to the principal axis of a convex lens...

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  19. Twot thin lenses when placed in contact, then the power of combination...

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  20. A convex lens is placed some where between an object and a screen whic...

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