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A ray o light is incident on the surface...

A ray o light is incident on the surface of separation of a medium with the velocity of igth at an angle `45^@`and is refracted in the medium at an angle `30^@`.Velocty of light in the medium will be:(Veloctiy of light= `3xx10^8 m s^(-1)`).

A

`3.8 xx 10^8 m s^(-1)`

B

`2.28 xx 10^8 m s^(-1)`

C

`2.12 xx 10^8 m s^(-1)`

D

`1.56 xx 10^8 m s^(-1)`.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. In refraction,light waves are bent on passing from one medum to the se...

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  2. Time taken by the sun igth to pass through a glas slab of 2 mm thickne...

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  3. A ray o light is incident on the surface of separation of a medium wit...

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  4. A glass slab of thickness 12 mm is placed on a table .The lower surfa...

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  5. Total inrternal reflection tkes place

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  6. The value of the critial angle is least for which of the following col...

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  7. Answer the following questions: A diver under water, looks obliquely ...

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  8. A pile 4 m high stands in the lake,such that it protrudes y 1m above t...

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  9. A transparent cube of side 210 mm contains a small air bubble. Its app...

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  10. If the critical angle for total internl reflection from a medium to v...

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  11. Light enters at an angle of incidence in a transparent rod of material...

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  12. Explain the formation of mirage.

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  14. Twinkling of stars is due to atmospheric:

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  16. A convex lens becomes less converging when placed in

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  17. An air bubble inside the water behaves as:

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