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Give the ratio of velocities of two ligh...

Give the ratio of velocities of two light waves traveling in vacuum and having wavelengths `5000A^@` and `6000A^@`.

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AAKASH SERIES-RAY OPTICS-EXERCISE (VERY SHORT ANSWER QUESTIONS )
  1. What is dispersion ?

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  2. Define refractive index and relative refractive index

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  3. Give the ratio of velocities of two light waves traveling in vacuum an...

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  4. For the same angle of incidence, the angles of refraction in three dif...

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  5. Can absolute refractive index of a medium be less than unity ?

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  6. Can absolute refractive index of a medium be less than unity ?

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  7. A beam of light is converging towards a point. A plane parallel plate ...

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  8. Explain why: (a) A flying bird appears higher in the sky than it reall...

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  9. What happens to the frequency, wavelength and speed of light that cros...

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  10. Suppose you are inside the water in a swimming pool near an edge. A fr...

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  11. Light enters from air to glass having refractive index 1.50. What is t...

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  12. Define bond energy. On what factors does it depend?

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  13. State the consequences of total internal reflection?

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  14. What is an optical fibre? State its principle.

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  15. Why do diamonds sparkle?

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  16. A ray of light while traveling from a denser to rarer medium grazes th...

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  17. If theta c in the critical angle, write the deviation value when the r...

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  18. Consider a ray of light passing from one medium to another. If the ang...

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  19. Mention any three uses of optical fibres.

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  20. It is possible for a lens to act as convergent in one medium and diver...

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