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The sun is visible to us before actual……...

The sun is visible to us before actual………….and after………. . This is because of ………………. .

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sunrise , set , atmoshperic refraction.
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PRADEEP-OPTICS-Exercise
  1. Refraction of light is the phenomenon of………. When it…………. .

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  2. The basic cause of refraction is…………in going…………. .

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  3. The sun is visible to us before actual………….and after………. . This is bec...

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  4. Total internal reflection of light is the phenomenon of………..into……..fr...

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  5. For toat internal reflection, light must travel……………to………….. .

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  6. Total internal reflection will occure only when………………in………….medium is…...

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  7. Mirage is accounted for by………….. .

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  8. When reflection occurs from denser to………….., then (mu(2))/(mu(1)) = ……...

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  9. For a double convex lens R(1) is………….. And R(2) is…………… . Therefore, i...

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  10. One dioptre is……………of focal length……… .

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  11. A mark is made on the bottom of beaker and a microscope is focussed on...

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  12. Calculate the speed and wvaelength of light (i) in glass (ii) in air, ...

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  13. The refractive index of diamond is 2.47 and that of glass is 1.51. How...

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  14. A pond of depth 20 cm is half filled with an oil of mu = 1.4 and the o...

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  15. A ray of light is incident at an angle of 60^(@) on one face of a rect...

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  16. In Fig. find the maximum angle i for which light suffers total interna...

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  17. Calculate the critical angle for glass air surface if a ray of light w...

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  18. A small bulb (assumed to be a point source) is placed at the bottom of...

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  19. The refractive indices of glycerine and water are 1.46 and 1.33 repect...

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  20. A point source of monochromatic light 'S' is kept at the centre of the...

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