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There is a mark at the base of an empty beaker. The mark is focussed with the help of a microscope from above. If turpentine oil of 4 cm height is poured in the beaker, the microscope is to raised by 1.28 cm upwards, to focus the mark.
Determine the refractive index of the turpentine oil.

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The correct Answer is:
1.47
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CHHAYA PUBLICATION-REFRACTION OF LIGHT-Problem set - II
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  2. A tank's depth is 2d and the apparent depth of the liquid in the tank ...

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  3. A ray of light is incident on a transparent block of refractive index ...

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  4. The height of a vessel is 15 cm . Liquid is poured into the vessel suc...

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  5. The length of a fish is 12 cm. The fish is advancing forward to the fr...

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  6. There is a mark at the base of an empty beaker. The mark is focussed w...

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  7. A hemisphere of radius 4 cm is placed centrally on cross mark. When i...

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  8. A rectangular block of thickness 10 cm and refractive index 1.5 is pla...

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  9. A microscope is focussed on a point at the base of an empty vessel. No...

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  10. A part of straight stick is immersed in water in an inclined way. When...

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  11. A glass is filled with water up to 12.5 cm. The apparent depth of an o...

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  12. A glass if filled with water up to 12.5 cm. The apparent depth of an n...

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  13. A small electric lamp is placed at a depth of 46 cm inside a tank full...

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  14. A luminous point source is placed at a depth of 30 cm in a source cont...

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  15. A source of light is placed at the bottom of a tank filled with water ...

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  16. wavelength of light in a medium is 4000 Å and that in another medium i...

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  17. Light ray passes through an equilateral prism (mu = 1.5) such that the...

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