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While passing through the prism the ligh...

While passing through the prism the light ray travelling from air to glass bends towards the ………..

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When a light wave travels from air to glass,

For a light ray passing through the prism, the angle between the incident ray and the emergent ray is known as the .........

In the above figure a narrow beam of white light is shown to pass through a triangular glass prism. After passing through the prism, it produces a spectrum XY on a screen. State the colour seen at (i) X and (ii) Y.

A transparent thin film of uniform thickness and refractive index n_(1) =1.4 is coated on the convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index n_(2) =1.5 , as shown in the figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance f_(1) from the film, while rays of light traversing from glass to air get focused at distance f_(2) from the film, Then

For refractin of light through a prism

........ light, while passing through a prism, does not disperse.

When unpolarised light beam is incident from air into glass (n =1.5) at the polarised angle .......

The angle of incidence for a ray of light at a refracting surface of a prism is 45^@ . The angle of prism is 60^@ . If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are

A glass prism of angle A = 60^(@) gives minimum angle of deviation theta ~~ 30^(@) with the maximum error of 1^(@) when a beam of parallel light passed through the prism during an experiment. Find the permissible error in the measurement of refractive index mu of the material of the prism.

KUMAR PRAKASHAN-THE HUMAN EYE AND THE COLOURFUL WORLD-OBJECTIVE QUESTIONS AND ANSWERS(Fill in the blanks)
  1. The type of image formed by the eye lens is ......... and .......

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  2. A triangular glass prism has ......... triangular bases and ......... ...

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  3. Light enters our eye through the .......

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  4. A person suffering from far-sightedness or hypermetropia cannot see cl...

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  5. A ......... corrective lens is used to rectify near-sightedness.

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  6. An old person suffering from near-sightedness and a far-sightedness us...

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  7. While passing through the prism the light ray travelling from air to g...

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  8. In a glass prism ......... light propagates with maximum speed.

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  9. At night stars are seen slightly at a higher position than their actua...

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  10. For a light ray passing through the prism, the angle between the incid...

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  11. At the time of sunrise the sun appears ........ in colour.

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  12. The fine particles in air scatter ......... light more strongly.

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  13. ........ light, while passing through a prism, does not disperse.

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  14. Stars behave like ........ sources of light and planets behave like .....

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  15. Danger signals are red in colour because red light is ..........

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  16. In the spectrum of white light, ……….. and ........ colours seen at the...

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  17. The diameter of the human eyeball is approximately ..... . cm.

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  18. The distance between the eye lens and the retina is known as the ........

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  19. In the normal situation in the relaxed position of the ciliary muscles...

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  20. At night as we move up in the atmosphere of the earth, the refractive ...

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