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If I is the intesity of light entering i...

If I is the intesity of light entering into the optical fibre and `I_C` is that emerging from the fibre then

A

`I approx I_e`

B

`I ltlt I_e`

C

`I gtgt I_e`

D

`I_e approx frac(I)(2)`

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TARGET PUBLICATION-OPTICS-EXERCISE
  1. When a light is incident at one end of the fibre at a small angle, the...

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  2. The light entering into the fibre suffers

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

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

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

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

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

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

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  9. The focal length of a lens depends upon

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  10. The lense formula with normal notation is given by

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  11. The lens maker's equation is given by

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

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

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

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

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

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

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  18. A plano-convex lens has focal length of 20 cm. the radius of its sph...

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  19. The focal length of concave lens, accroding to new Cartesiaon sign co...

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  20. A diverging lens may NOT have

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