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What is the reason for the twinkling of ...

What is the reason for the twinkling of star?

A

(a) Explosions occurring in the stars from time to time

B

(b) Absorption of light in the earth's atmosphere

C

(c) Motion of stars

D

(d) Changing refractive index of the atmospheric gases

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CHETANA PUBLICATION-LIGHT-REFLECTION AND REFRACTION-EXAMPLE
  1. What is the reason for the twinkling of star?

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  2. Find odd one out: Mirage, twinkling of stars, scattering of light, app...

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  3. Find odd one out: Critical angle, angle of incidence, angle of refract...

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  4. Find odd one out: Reflection, dispersion, refractive index, refraction

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  5. Find odd one out : Brown, Blue, Green, Red

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  6. Complete the analogy : Refractive index of water:1.33: : Refractive in...

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  7. Stars:Point source of light: : Planets :

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  8. Complete Analogy : Diamond: Denser medium: : Air:

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  9. Complete Analogy : Least deviation : Red: Maximum deviation:

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  10. What is the reason for the twinkling of star:?

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  11. Complete Analogy : Ice:1.31: : Water:

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  12. If nv, nr, nb are the refractive indices of violet, red and blue light...

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  13. Complete the analogy: 1n2 = v2/v1 : : 2n1 :

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  14. Complete the analogy: Lens: Transparent: : Mirror:

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  15. What is the refractive index of water?

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  16. Write the ratio of velocity of light in first medium to the velocity o...

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  17. What do you mean by dispersion of light?

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  18. What is critical angle?

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  19. What is refraction of light?

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  20. What is the value of angle of refraction if angle of incidence is 0^@?

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  21. When sunlight passes through glass prism which light deviates the leas...

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