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For a light ray passing through the pris...

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

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angle of deviation
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When light ray travels from denser to rarer medium and if theta_1 is incidence and theta_2 is refraction angle, then .....

A ray R_(1) is incident on the plane surface of the glass slab (kept in air) of refractive index sqrt(2) at angle of incident equal to the critical angle for this air glass system. The refracted ray R_(2) undergoes partial reflection & refraction at the other surface. The angle between the reflected ray R_(3) and the refracted ray R_(4) at that surface is :

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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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