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Twinkling of stars is due to atmospheric...

Twinkling of stars is due to atmospheric:

A

total internal reflection

B

high dense matter of the star

C

consatnt burning of hydrogen in the star

D

the fluctuating apparent osition of the stare being slightly differnt from the actual position of the star.

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. Light enters at an angle of incidence in a transparent rod of material...

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  2. Explain the formation of mirage.

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  3. Twinkling of stars is due to atmospheric:

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  4. Twinkling of stars is due to atmospheric:

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  5. A plano-convex lens is made of refractive index 1.6.If the radius of c...

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  6. A convex lens becomes less converging when placed in

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  7. An air bubble inside the water behaves as:

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  8. A lens behaves as a converging lens in air and diverging lens in wate...

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  9. A point source of light B,placed in front of the centre of a mirror of...

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  10. Two lenses have powers + 1 D and - 2 D respectively ,The power of comb...

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  11. Two lenses having powers + 6 D and - 4D are placed in contact.The powe...

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  12. An optical (eye specialist)prescibes spetacles is a pateint with a com...

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  13. The focal length of a convex lens is 30 cm and the size of image is qu...

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  14. A screen is placed 80 cm from an object. The image of the object on th...

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  15. Which of the following pairs can produce erect,diminshed and virutual ...

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  16. In order to obtain a real image of magnification 2 using a convergin l...

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  17. Which of the following is true for rays coming from infinity?

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  18. At what angle ,a ray of light will incident on one face of an equilate...

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  19. The blue colour of the sky is due to the phenomenon of

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  20. The sky appears blue, because.

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