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A diverging beam of light from a point s...

A diverging beam of light from a point source S having divergence angle `alpha`, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index n, then the divergence angle of the emergent beam is
.

A

zero

B

`alpha`

C

`sin^(-1)(1//mu)`

D

`2 sin^(-1)(1//mu)`

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. A ray of light travelling in a transparent medium of refractie index m...

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  2. A beam of light is converging towards a point on a screen.A plane para...

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  3. A diverging beam of light from a point source S having divergence angl...

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  4. A ray of light travelling in water is incident on its surface open to ...

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  5. A rectangular glass slab ABCD of refractive index n1 is immersed in wa...

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  6. An observer can see through a pin-hole the top end of a thin rod of he...

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  7. Two beams of red and violet colours re mde to pass separaterly through...

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  8. A ray OP of monochromatic light is incident on the face AB of prism AB...

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  9. Which of the following forms (s) a virtual and erect image fo all posi...

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  10. A spherical surface radius of curvatue R seprates air (refractive inde...

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  11. A point object is placed at the centre of a glass sphere of radius 6 c...

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  12. The graph between object distance u and image distance v for a lens is...

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  13. A convex lens A of focal length 20 cm and a concave lens B of focal le...

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  14. The size of the image of an object,which is at infinity, as formed by ...

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  15. A convergeing lens is used to form an image on a screen.When the upper...

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  16. A point object is placed at a distance of 20 cmA point object is place...

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  17. A biconvex lens of focal length 15 cm is in front of a plane mirror.Th...

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  18. A concave lens of glass, refractive index 1.5 ,has both surfaces of th...

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  19. A double convex lens made from a material of refractive index mu1 is i...

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  20. A convex lens is in contact with concave lens .The magnitude of the ra...

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