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Consider telecommunication through optic...

Consider telecommunication through optical fibres. Which of the following statement is not ture?

A

Optical fibres may have homogeneous core with a suitable cladding.

B

Optical fibres can be of graded refractive index.

C

Optical fibres are subject to electromagnetic inerference from outside.

D

Optical fibres have extremely low transmission loss.

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TARGET PUBLICATION-OPTICS-EXERCISE
  1. The principle used in optical fibre is .

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  2. Optical fibre consists of large number of

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

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

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  5. The light entering into the fibre suffers

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

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

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

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

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

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

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  12. The focal length of a lens depends upon

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  13. The lense formula with normal notation is given by

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  14. The lens maker's equation is given by

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

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

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

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

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

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  20. What is the focal length of double convex lens for which radius of cur...

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