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Optical fibre consists of large number o...

Optical fibre consists of large number of

A

extremely thin fibres of fine quality glass or quartz.

B

extremely thin fibres of metal with high ductility.

C

extremely fine fibres of wood with very high plished surface.

D

thick fibres of fine quality glass or quartz.

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TARGET PUBLICATION-OPTICS-EXERCISE
  1. The critical angle for total internal reflection in diamond is 24.5^(@...

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  2. The principle used in optical fibre is .

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  3. Optical fibre consists of large number of

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  4. Consider telecommunication through optical fibres. Which of the follow...

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  5. When a light is incident at one end of the fibre at a small angle, the...

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  6. The light entering into the fibre suffers

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  7. If I is the intesity of light entering into the optical fibre and IC i...

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  8. In periscopes, totally reflecting prisms are used which turns the ray ...

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  9. While deriving expression for refraction at single curved, surface, ...

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  10. The correct expression for refraction at single convex spherical surfa...

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  11. The reciprocalof ((mu(2)-mu(1))/(R)) gives the value of

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  12. A point object is situated in air at a distance of 20 cm from a convex...

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  13. The focal length of a lens depends upon

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  14. The lense formula with normal notation is given by

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  15. The lens maker's equation is given by

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  16. For convex lens, the radii of curvatures of the first and second surfa...

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  17. A beam of light is incident on a convex lens nparallel to its principa...

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  18. An object is kept at 0.2 m from a convex lens of focal length of 0.15 ...

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  19. A convex lens of focal length f produces a real image 3 times as that ...

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  20. when an object is kept in frnt of a convex lens the distance between i...

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