Home
Class 12
PHYSICS
Why is a conical projection in front of ...

Why is a conical projection in front of the hole in Ferry's black body?

A

To avoid absorption ofradiations

B

To avoid return of the radiations by reflection

C

To avoid emission of radiations.

D

For some reason other than those mentioned above

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise Competitive thinking|187 Videos

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise Evaluation test|18 Videos

  • KINETIC THEORY OF GASES AND RADIATION

    TARGET PUBLICATION|Exercise Evaluation test|18 Videos

  • INTERFERENCE AND DIFFRACTION

    TARGET PUBLICATION|Exercise EVALUATION TEST|20 Videos

  • MAGNETIC EFFECT OF ELECTRIC CURRENT

    TARGET PUBLICATION|Exercise EVALUATION TEST|19 Videos

Similar Questions

Explore conceptually related problems

The black body have

A black body emits

Perfectly Black Body

Which one of the following is not a "Black-body" ?

Which of the following is the least black body?

Explain the construction and working of Ferry’s black body.

TARGET PUBLICATION-KINETIC THEORY OF GASES AND RADIATION -critical thinking
  1. If 'p' calorie of heat energy is incident on a body and absorbs 'q' ca...

    Text Solution

    |

  2. An ideal Black-body at room temperature is thrown into a furnace. It i...

    Text Solution

    |

  3. Why is a conical projection in front of the hole in Ferry's black body...

    Text Solution

    |

  4. If the temperature of any ideal black body is halved, then the wavelen...

    Text Solution

    |

  5. The rate of emission of heat energy per unit area of an iron ball of r...

    Text Solution

    |

  6. Emissive power of cube is 1000 J//m^2s and it · radiates heat at the r...

    Text Solution

    |

  7. A body of surface are 15xx10^(-3)m^2 emits 0.3 kcal in 40 second at a...

    Text Solution

    |

  8. A hot and a cold body are kept in vacuum separated from each other. Wh...

    Text Solution

    |

  9. Unit of Stefan's constant is

    Text Solution

    |

  10. If the temperature o fblack body decreases to half of the initial temp...

    Text Solution

    |

  11. If the temperature of a hot body is increased by 50%, then the increas...

    Text Solution

    |

  12. The temperatures of two bodies A and B are 727^(@)C and 127^(@)C . Th...

    Text Solution

    |

  13. A spherical black body with a radius of 20 cm radiates 440 W power at ...

    Text Solution

    |

  14. A body having a surface area of 50cm^2 radiates 300J of energy per min...

    Text Solution

    |

  15. At 127^(@)C radiated energy is 2.7 xx 10^(-3) J//s. At what temperatur...

    Text Solution

    |

  16. The rate of cooling at 600 K, if surrounding temperature is 300 K is R...

    Text Solution

    |

  17. Two solid spheres of radii R(1) and R(2) are made of the same material...

    Text Solution

    |

  18. A black body radiates 6 J//cm^2s when its temperature is 127 °C. How m...

    Text Solution

    |

  19. The ratio of masses of two metal spheres A and B is 8 : I. If their te...

    Text Solution

    |

  20. A hot liquid is kept in a big room. The logarithm of the numerical val...

    Text Solution

    |