Home
Class 12
PHYSICS
Assertion : The clouds in sky generally ...

Assertion : The clouds in sky generally appear to be whitish.
Reason : Diffraction due to clouds is efficient in equal measure at all wavelengths.

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

Text Solution

Verified by Experts

The correct Answer is:
C
Promotional Banner

Topper's Solved these Questions

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -II (INTERFERENCE)|26 Videos

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -II (DIFFRACTION)|17 Videos

  • WAVES OPTICS

    AAKASH SERIES|Exercise EXERCISE -IA (ASCENDING AND DSCENDING ORDER TYPE QUESTIONS)|6 Videos

  • WAVES

    AAKASH SERIES|Exercise EXERCISE-III (Doppler effect :)|15 Videos

Similar Questions

Explore conceptually related problems

Assertion : The clouds in the sky generally appear to be whitish. Reason : Diffraction due to clouds is efficient in equal measures its all wavelengths.

What is the reason for floating of clouds in the sky?

Assertion : Rainy clouds appear dark from below. Reason : There is not sufficient light which can be scattered by these clouds.

Assertion : Productivity generally increases from polar regions towards the tropics . Reason : It is due to increasing sunlight and temperature towards the tropics .

Assertion: All enzymes found in cells are invariably proteins which catalyse biological reactions. Reason : Enzymes act efficiently at a moderate temperature and pH.

Assertion : In the case of free fall of the lift, the man will feel weightlessness. Reason : In free fall, acceleration of lift is equal to acceleration due to gravity.

Assertion: In general |Displacement| le distance. Reason: The instantaneous speed is equal to the magnitude of the instantaneous velocity,

Assertion : The fringe closest on either side of the central white fringe in case of interference pattern due to white light is red and the farthest appears blue. Reason : The interference patterns due to different component colours of white light overlap.

Assertion : The speedometer of an automobile measure the average speed of the automobile. Reason : Average velocity is equal to total displacement per total time taken.

Assertion : The wave nature of electrons was first experimentally verified by Davisson and Germer Experiment. Reason : From the electron diffraction measurements, the wavelength of metter waves was found to 0.165 nm.

AAKASH SERIES-WAVES OPTICS-EXERCISE -IB (ASSERTION AND REASON)
  1. A : At the first glance, the top surf Morpho butterfly.s wing appears ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  20. Assertion (A): Skiers uses air glasses. Reason(R) : Light reflecte...

    Text Solution

    |