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A : Coloured spectrum is seen when we lo...

A : Coloured spectrum is seen when we look through a muslin cloth.
R : The coloured spectrum is due to diffraction of white light on passing through fine slits made by fine threads in the muslin cloth.

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true and R is not the correct explanation of A

C

A is true and R is false

D

Both A and R are false

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The correct Answer is:
A
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AAKASH SERIES-WAVES OPTICS-EXERCISE -IB (ASSERTION AND REASON)
  1. A : There is no specific important physical difference between interfe...

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  2. A : At the first glance, the top surf Morpho butterfly.s wing appears ...

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  3. A : Coloured spectrum is seen when we look through a muslin cloth. R...

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  4. Assertion : The clouds in sky generally appear to be whitish. Reason...

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  5. A : In double slit experiment, the pattern on the screen is actually a...

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  6. Assertion : Standard optical diffraction gratings cannot be used for ...

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  7. A : When tiny circular obstacle is placed in the path of light from so...

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  8. A : The resolving power of both miroscope and telescope depends on the...

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  9. A : The resolving power of an electron microscope is higher than that ...

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  10. Assertion (A) To increase resolving power of a telescope, the apertur...

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  11. A : To increase the resolving power of a microscope, .oil immersion ob...

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  12. Assertion : The resolving power of a telescope is more if the diameter...

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  13. A : Resolving power of a microscope can be increased by choosing a med...

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  14. A : Spy satilight cameras use lenses with very large aperatures. R :...

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  15. A : Transverse wave nature of light is proved by polarisation. R : A...

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  16. A : Nicol prism is used to produce and analyse plane polarised light. ...

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  17. A : When an unpolarised light is incident on a glass plate at Brewster...

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  18. A : The unpolarised light and polarised light can be distinguished fro...

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  19. A : Light coming from numbers of calculator.s L.C.D display is polaris...

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  20. A : One of the images in double refraction doesn't obey the principles...

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