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

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

A

`theta=49^(@)`

B

`theta=90^(@)`

C

`theta=98^(@)`

D

`theta=24.5^(@)`

Text Solution

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The correct Answer is:
C
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
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  4. A parallel beam of monochromatic light falls on a combination of a con...

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

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

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

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  8. A convex mirror forms an image one-fourth the size of the object. If o...

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  9. A travelling microscope is focussed on to a scratch on the bottom of a...

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  10. While a moving picture is being screened, a boy introduced a glass sla...

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

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

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

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

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

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

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

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

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

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

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