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A fish is a little away below the surfac...

A fish is a little away below the surface of a lake. If the critical angle is `49^(@)` , then the fish could see things above the water surface withing an angular range of `theta^(@)` where

A

`theta = 49^(@)`

B

`theta = 90^(@)`

C

`theta = 98^(@)`

D

`theta = 24.5^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-Assignment (Section - A) Objective Type Questions (One option is correct)
  1. Light takes t(1) second to travel a distance x cm in vacuum and the sa...

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  2. In the figure shown, for an angle of incidence 45^(@), at top surface,...

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  3. A fish is a little away below the surface of a lake. If the critical a...

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  4. A parallel beam of monochromatic light falls on a combination of a con...

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  5. In question 118, if m(1) and m(2) are the magnifications for two posit...

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  6. Three lenses in contact have a combined focal length of 12 cm. When th...

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  7. A lens made of material of Refractive index mu(2) is surrounded by a m...

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  8. The radii of curvatures of a convex lens are 0.04 m and 0.04m. Its ref...

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  9. For a plano convex lens, the radius of curvature of convex surface is ...

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  10. A convex glass lens (mu(g) = 1.5) has a focal length of 8 cm when plac...

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  11. A light ray is incident normally on one of the refracting faces of a p...

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

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  13. A ray of light is incident on one of the faces of the angle prism with...

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  14. A prism of refractive index sqrt2 has refractive angle 60^@. In the or...

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  15. The least angle of deviation for a glass prism is equal to its refract...

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  16. A light ray of angles of incidence 40^(@) emerged from the prism in mi...

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  17. The angle of minimum deviation for a 75^(@) prism of dense glass is fo...

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  18. Suppose a small angled prism of 6^(@) deviates a ray through 3^(@), th...

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  19. A crown glass prism of angle 5^@ is to be combined with a flint glass ...

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  20. A thin prism of angle 6^(@) made up of glass of refractive index 1.5 i...

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