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A beam of light is partially reflected a...

A beam of light is partially reflected and partially refracted from a surface. The angle between reflected and refracted light ray is `90^(@)`. If the angle of refraction is `30^(@)`, the angle of incidence is

A

`60^(@)`

B

`48^(@)`

C

`45^(@)`

D

`90^(@)`

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The correct Answer is:
A
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AAKASH INSTITUTE ENGLISH-RAY OPTICS AND OPTICAL INSTRUMENTS-EXERCISE
  1. The time taken by a monochromatic light to travel a certain distance i...

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  2. A monochromatic light passes through a glass slab (mu = (3)/(2)) of th...

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  3. A beam of light is partially reflected and partially refracted from a ...

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  4. An object is placed in front of a slab (mu=1.5) of thickness 6cm at a ...

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  5. A glass slab of thickness 4 cm contains the same number of waves as 5 ...

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  6. The velocities of light in two different media are 2*10^8m/s and 2.5 *...

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  7. Light takes t(1) second to travel a distance x cm in vacuum and the sa...

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  8. A fish is a little away below the surface of a take. If the critical a...

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

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

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

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

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

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

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

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

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

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

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

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

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