Home
Class 11
PHYSICS
Explain why, a body with large reflect...

Explain why,
a body with large reflectivity is a poor emitter.

Text Solution

Verified by Experts

According to Kirchhoff.s law, good absorber is good emitter and its reverse is, weak absorber is weak emitter.
It is clear that if absorptivity is high, then reflectivity is low and if absorptivity is low, then reflectivity is high.
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B (Numericals) Numerical From Textual Exercise (Answer the following : )|4 Videos
  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B Numerical From .DARPAN. Based On Textbook|7 Videos
  • THERMAL PROPERTIES OF MATTER

    KUMAR PRAKASHAN|Exercise Section - B|10 Videos
  • SYSTEMS OF PARTICLES AND ROTATIONAL MOTION

    KUMAR PRAKASHAN|Exercise SECTION-F (SECTION-D) QUESTIONS PAPER|1 Videos
  • THERMODYANMICS

    KUMAR PRAKASHAN|Exercise Question Paper|11 Videos
KUMAR PRAKASHAN-THERMAL PROPERTIES OF MATTER-Section - B (Numericals) Numerical From Textual Exercise
  1. A large steel wheel is to be fitted on to a shaft of the same material...

    Text Solution

    |

  2. A hole is drilled in a copper sheet. The diameter of the hole is 4.24 ...

    Text Solution

    |

  3. A steel wire 0.72 m long has a mass of 5.0 xx 10 ^(-3) kg. If the wire...

    Text Solution

    |

  4. A brass rod of length 50 cm and diameter 3.0 mm is joined to a steel r...

    Text Solution

    |

  5. The coefficient of volume expansion of glycerin is 49xx10^(-5)K^(-1). ...

    Text Solution

    |

  6. A 10 kW drilling machine is used to drill a bore in a small aluminium ...

    Text Solution

    |

  7. A copper block of mass 2.5 kg is heated in a furnace to a temperature ...

    Text Solution

    |

  8. In an experiment on the specific heat of a metal, a 0.20 kg block of t...

    Text Solution

    |

  9. Given below are observations on molar specific heats at room temperatu...

    Text Solution

    |

  10. Answer the following questions based on the P-T phase diagram of carbo...

    Text Solution

    |

  11. Answer the following questions based on the P - T phase diagram of CO(...

    Text Solution

    |

  12. A child running a temperature if 101^(@)F is given an antipyrine (i.e....

    Text Solution

    |

  13. A 'thermacole' icebox is cheap and efficient method for storing small ...

    Text Solution

    |

  14. A brass boiler has a base of 0.15m^(2) and thickness 1.0 cm. It boils ...

    Text Solution

    |

  15. Explain why, a body with large reflectivity is a poor emitter.

    Text Solution

    |

  16. Explain why, a brass tumbler feels much colder than a wooden tray on...

    Text Solution

    |

  17. Explain why, an optical pyrometer (for measuring high temperatures) ...

    Text Solution

    |

  18. Explain why, the earth without its atmosphere would be inhospitably ...

    Text Solution

    |

  19. Explain why, heating systems based on circulation of steam are more ...

    Text Solution

    |

  20. A body cools from 80^(@)C to 50^(@)C in 5 minutes Calculate the time i...

    Text Solution

    |