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A light beam is travelling from Region I...

A light beam is travelling from Region I to IV (figure). The refractive index in regionals I,II,III and IV are `n_0=(n_0)/(2)(n_0)/(6) `and` (n_0)/(8) `respectively. The angle of incidence theta for which the beam just misses entering region IV is-

A

`sin^(-1) (1//8)`

B

`sin^(-1)(1//4)`

C

`sin^(-1)(1//3)`

D

`sin^(-1)(3//4)`

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. A container is filled with water (mu= 1.33) upto a height of 33.25 cm ...

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  2. A ray of light passes through four transparent media with refractive i...

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  3. A light beam is travelling from Region I to IV (figure). The refractiv...

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  4. A ray of light is incident at the glass-water interface at an angle i....

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  5. A ray of light travelling in a transparent medium of refractie index m...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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