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Optical fibers are based on the phenomen...

Optical fibers are based on the phenomenon of

A

reflection

B

refraction

C

dispersion

D

total internal relflection

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The correct Answer is:
D
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  2. For total internal reflection, light must travel

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  3. Optical fibers are based on the phenomenon of

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  5. In the above question, the ralation remains the same whether (A) ima...

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  6. The focal length of a double convex lens is equal to radius of curvatu...

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  7. One dioptre is the power of a lens of facal length

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  8. Two lenses of focal lengths 20 cm and - 40 cm are held in contact. The...

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  9. Refraction of light is the phenomenon of………. When it…………. .

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  10. The basic cause of refraction is…………in going…………. .

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  11. The sun is visible to us before actual………….and after………. . This is bec...

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  12. Total internal reflection of light is the phenomenon of………..into……..fr...

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  13. For toat internal reflection, light must travel……………to………….. .

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  14. Total internal reflection will occure only when………………in………….medium is…...

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  15. Mirage is accounted for by………….. .

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  16. When reflection occurs from denser to………….., then (mu(2))/(mu(1)) = ……...

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  17. For a double convex lens R(1) is………….. And R(2) is…………… . Therefore, i...

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  18. One dioptre is……………of focal length……… .

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  19. A mark is made on the bottom of beaker and a microscope is focussed on...

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  20. Calculate the speed and wvaelength of light (i) in glass (ii) in air, ...

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