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An under water swimmer is at a depth of ...

An under water swimmer is at a depth of 12 m below the surface of water. A bird is at a height of 18 m from the surface of water, directly above his eyes. For the swimmer the bird appears to be at a distance from the surface of water equal to (Refracting index of water is 4/3)

A

24m

B

12m

C

36m

D

18m

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The correct Answer is:
A
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AAKASH SERIES-GEOMETRICAL OPTICS-ADDITIONAL PRACTICE EXERCISE (LEVEL-II PRACTICE SHEET (ADVANCED) STRAIGHT OBJECTIVE TYPE QUESTIONS)
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  2. A mark at the bottom of a liquid appears to rise by 0.1 m. The depth o...

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  3. An under water swimmer is at a depth of 12 m below the surface of wate...

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  4. A microscope is focussed on a coin lying at the bottom of a beaker. Th...

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

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  6. A parallel beam of white light falls on a convex lens. Images of blue,...

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  7. A ray of light is incident on the face AB of a glass prism ABC having ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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