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A microscope is focussed on a coin lying...

A microscope is focussed on a coin lying at the bottom of a beaker. The microscope is now raised by 1 cm. To what depth should water be poured into the beaker so that the coin is again in focus?
(The refractive index of water is `4/3`)

A

1cm

B

4/3cm

C

3cm

D

4cm

Text Solution

Verified by Experts

The correct Answer is:
D
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AAKASH SERIES-GEOMETRICAL OPTICS-ADDITIONAL PRACTICE EXERCISE (LEVEL-II PRACTICE SHEET (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  6. A ray of light is incident on the face AB of a glass prism ABC having ...

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  7. The refracting angle of a prism is A, and refractive index of the mate...

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  8. A ray of light is incident on the hypotenuse of a right-angled prism a...

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  9. A plane mirror is fixed at the bottom of a tank containing water. A sm...

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  10. A ray of light travelling in glass having refractive index (a)mu(g)=3/...

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  11. A light ray is normally incident onone face of equilateral glass prism...

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  12. A equilateral glass prism has a refractive index sqrt(2). A light ray ...

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  13. The n transparent slabs of refractive index1.5 each having thickness 1...

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  14. A glass sphere of diameter 50 cm and mu=1.5 has a small air bubble. Lo...

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  15. A parallel beam falls on solid glass sphere of radius R and refractive...

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  16. A transparent glass sphere of radius 10 cm and refractive index mu=1.5...

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  17. A convex lens of focal length 20cm and another plano convex lens of fo...

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  18. A symmetrical bioconcave lens having radius of curvature R is made up ...

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  19. Light is incident on the thin lens as shown in figure. The refractive ...

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  20. The given lens is broken into four parts rearranged as shown. If the i...

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