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Define diffraction. What should be the o...

Define diffraction. What should be the order of the size of the aperture to observe diffraction.

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CBSE COMPLEMENTARY MATERIAL-ELECTROMAGNETIC WAVES AND OPTICS-SHORT ANSWER QUESTION 2 MARKS
  1. Name any two characteristics of light which do not change on polarisat...

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  2. Complete the path of light with correct value of angle of emergence.

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  3. Define diffraction. What should be the order of the size of the apertu...

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  4. Show that maximum intensity in interference pattern is four times the ...

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  5. Two poles-one 4 m high and the other is 4.5 m high are situated at dis...

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  6. S1 and S2 are two sources of light separated by a distance d. A detect...

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  7. If a jogger runs with constant speed towards a vehicle, how fast does ...

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  8. If the angle between the pass axis of polariser and analyser is 45^(@)...

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  9. When does (i) a plane mirror and (ii) a convex mirror produce real ima...

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  10. A virtual cannot be caought on a screen, Yet when we see a virtual ima...

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  11. With a neat labelled diagram, explain advanced sunrise and delayed sun...

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  12. The image of a small electric bulb fixed on the wall of a room is to b...

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  13. The angle subtended at the eye by an object is equal to the angle subt...

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  14. Two independent light sources cannot act as coherent sources. Why?

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  15. How is a wave front different from a ray? Draw the geometrical shape o...

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  16. What two main changes in diffraction pattern of a single slit will you...

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  17. You are provided with four convex lenses of focal length 1cm, 3cm, 10 ...

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  18. Give reasons for the following Sun looks reddish at sunset

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  19. Why do clouds generally look white ?

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  20. Using Huygens' principle for the wave theory of light, verify the law ...

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