Home
Class 11
PHYSICS
The absorptivity of Lamp black and plati...

The absorptivity of Lamp black and platinum black is .

A

`0.91`

B

`0.98`

C

`1.00`

D

`0.99`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL -1 (C.W)|1 Videos
  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL (C.W)|13 Videos
  • TRANSMISSION OF HEAT

    NARAYNA|Exercise LEVEL-II(C.W)|27 Videos
  • THERMODYNAMICS

    NARAYNA|Exercise Exercise|187 Videos
  • UNITS AND MEASUREMENTS

    NARAYNA|Exercise STATEMENT TYPE QUESTION|23 Videos

Similar Questions

Explore conceptually related problems

Black lead is

The absorption of hydrogen by platinum is known as :

Why does a black board appears black in colour ?

Black tin is

Black ash is

Black death is

Assertion : Coefficient of absorption of radiation of an ideal black body is 1 . Reason : An ideal black body emits radiation of all wavelengths.

NARAYNA-TRANSMISSION OF HEAT-C .U .Q
  1. If we place our hand below a lighted electric bulb We feel warmer beca...

    Text Solution

    |

  2. Heating effect of the incoming solar radiation is maximum at local noo...

    Text Solution

    |

  3. The absorptivity of Lamp black and platinum black is .

    Text Solution

    |

  4. Absorptive power of a white body and of a perfectly black body respect...

    Text Solution

    |

  5. Three bodies A,B,C are at -27^(@)C, 0^(@)C, 100^(@)C respectively The ...

    Text Solution

    |

  6. At high temperature black body spectrum is .

    Text Solution

    |

  7. A black body emits

    Text Solution

    |

  8. The best laboratory approximation to an ideal black body is .

    Text Solution

    |

  9. A black body does not .

    Text Solution

    |

  10. If the amount of heat energy received per unit area from the Sun is me...

    Text Solution

    |

  11. The colour of a star is a measure of its .

    Text Solution

    |

  12. A polished metal plate with a rough black spot on it is heated to abou...

    Text Solution

    |

  13. If 'p' calorie of heat energy is incident on a body and absorbs 'q' ca...

    Text Solution

    |

  14. The velocity of heat radiation in vacuum is .

    Text Solution

    |

  15. Distribution of enrgy in the spectrum of a black body can be correctly...

    Text Solution

    |

  16. Four pieces of iron are heated to different are respectively red, yell...

    Text Solution

    |

  17. A star which appears blue will be

    Text Solution

    |

  18. If a star is colder than the Sun it appears

    Text Solution

    |

  19. The amount of radiation emitted by a perfectly black body is proportio...

    Text Solution

    |

  20. At a given temperature the ratio between emissive power and absorptive...

    Text Solution

    |