Home
Class 12
PHYSICS
Relation between emissivity e and absorp...

Relation between emissivity e and absorptive power a is (for black body)

A

`e=a^2`

B

`e=a`

C

`e=a^(-1)`

D

`e=a^(-2)`

Text Solution

Verified by Experts

The correct Answer is:
B

e = a for a black body.
Promotional Banner

Topper's Solved these Questions

  • HEAT AND THERMAL PHYSICS

    MTG-WBJEE|Exercise WB JEE WORKOUT ( CATEGORY 2: SINGLE OPTION CORRECT TYPE )|14 Videos
  • HEAT AND THERMAL PHYSICS

    MTG-WBJEE|Exercise WB JEE WORKOUT ( CATEGORY 2: ONE OR MORE THAN ONE OPTION CORRECT TYPE)|11 Videos
  • GRAVITATION

    MTG-WBJEE|Exercise WB JEE Previous Years Questions (CATEGORY 1: Single Option Correct Type|7 Videos
  • KINEMATICS

    MTG-WBJEE|Exercise WB JEE Previous Years Questions (CATEGORY 3 : One or More than One Option Correct Type (2 Marks) )|1 Videos

Similar Questions

Explore conceptually related problems

At a given temperature the ratio between emissive power and absorptive power is same for all bodies and is equal to the emissive power of black body This statemetn is called .

The graph, shown in the adjacent diagram, represents the variation of temperature (T) of two bodies, x and y having same surface area, with time (t) due to the emission of radiation. Find the correct relation between the emissivity and absorptivity power of the two bodies

The graph shown in the adjacement diagram represents the variation of temperature (T) of two bodies x and y having the same surface area, with time (t). Both of these bodies lose heat only due to the emission of radiation. Find the correct relation between the emissive and absorptive power of the two bodies.

If between wavelength lambda and lambda + dlambda , e_(lambda) and a_(lambda) be the emissive and absorptive powers of a body and E_(lambda) be the emissive power of a perfectly black body, then according to Kirchoff's law, which is true

What is the absorptive power of a perfectly black body ?

Define absorptive power and emissive power of a body.

A: The value of the absorptive power and the emissivity has the same value for a single body at a particular temperature. R: Value of absorptive power is 1 for a black body.

If at temperature T , the emissive power and absorption power of a body for wave length are e_(lambda) and a_(lambda) respectively, then-

MTG-WBJEE-HEAT AND THERMAL PHYSICS-WB JEE PREVIOUS YEARS QUESTIONS
  1. Relation between emissivity e and absorptive power a is (for black bod...

    Text Solution

    |

  2. In which mode of tranmission , the heat waves travel along straight li...

    Text Solution

    |

  3. Consider a black body radiation in a cubical box at absolute temperatu...

    Text Solution

    |

  4. A small quantity mass m, of water at a temperature theta ("in " ^(@)C)...

    Text Solution

    |

  5. Same quantity of ice is filled in each of the two metal containers P a...

    Text Solution

    |

  6. A metal rod if fixed rigidly at two ends so as to prevent its hermalex...

    Text Solution

    |

  7. A solid at temperature T(1) is kept in an evacuated chamber at tempera...

    Text Solution

    |

  8. Three bodies of the same material and having masses m,m and 3m...

    Text Solution

    |

  9. If the temperature of the sun (black body) is doubled, the rate of ene...

    Text Solution

    |

  10. The temperature of the water of pond is 0^@ C while that of the surro...

    Text Solution

    |

  11. A solid rectangular sheet has two different coefficients of linear exp...

    Text Solution

    |

  12. The water equivalent of a calorimeter is 10 g and it contains 50 g of ...

    Text Solution

    |

  13. Two black bodies A and B have equal surface areas and are maintained a...

    Text Solution

    |

  14. A 10 watt electric heater is used to heat a container filled with 0.5 ...

    Text Solution

    |

  15. A steam of water flowing horizontally with a speed of 25m ^(s-1) gushe...

    Text Solution

    |

  16. Two identical blocks of ice move in opposite directions with equal spe...

    Text Solution

    |