Home
Class 12
PHYSICS
A body, which emits radiations of all po...

A body, which emits radiations of all possible wavelengths, is known as

A

Good conductor

B

Partial radiator

C

Absorber of photons

D

Perfectly black body

Text Solution

Verified by Experts

The correct Answer is:
D
Promotional Banner

Topper's Solved these Questions

  • THERMAL PROPERTIES OF MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-B) Objective Type questions (one option is correct)|15 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Assignment (Section-C) Objective Type questions (More than one option are correct)|12 Videos

  • THERMAL PROPERTIES OF MATTER

    AAKASH INSTITUTE ENGLISH|Exercise Try Youself|16 Videos

  • TEST2

    AAKASH INSTITUTE ENGLISH|Exercise EXERCISE|2 Videos

  • THERMODYNAMICS

    AAKASH INSTITUTE ENGLISH|Exercise ASSIGNMENT (SECTION -D) (Assertion - Reason Type Questions)|10 Videos

Similar Questions

Explore conceptually related problems

A black body emits radiations of maximum intensity at a wavelength of Å 5000 , when the temperature of the body is 1227^(@)C . If the temperature of the body is increased by 1000^(@)C , the maximum intensity of emitted radiation would be observed at

Hydrogen atom absorbs radiations of wavelength lambda_0 and consequently emit radiations of 6 different wavelengths, of which two wavelengths are longer than lambda_0 . Chosses the correct alternative(s).

Hydrogen atom absorbs radiations of wavelength lambda_0 and consequently emit radiations of 6 different wavelengths, of which two wavelengths are longer than lambda_0 . Chosses the correct alternative(s).

Which among the following electron will emit radiation of maximum wavelength ?

A black body emits radiation of maximum intensity at a wavelength of 5000A when the temperature of the body is 1227^(@) C. If the temperature of the body is increased by 1000^(@) C, calculate the wavelength corresponding to the maximum intensity.

Two black bodies A and B emit radiations with peak intensities at wavelengths 4000 A and 8000 A respectively. Compare the total energy emitted per unit area per second by the two bodies.

A star which is emitting radiation at a wavelength of 5000A is approaching the earth with a velocity of 1.50 xx10^(6) m//s The change in wavelegth of the radiation as received on the earth is

Electromagnetic radiation with maximum wavelengths is :

A gas of hydrogen - like atoms can absorb radiations of 698 eV . Consequently , the atoms emit radiation of only three different wavelengths . All the wavelengthsare equal to or smaller than that of the absorbed photon. a Determine the initial state of the gas atoms. b Identify the gas atoms c Find the minimum wavelength of the emitted radiation , d Find the ionization energy and the respective wavelength for the gas atoms.

Monochromatic radiation of wavelength lambda are incident on a hydrogen sample in ground state. Hydrogen atoms absorb the light and subsequently emit radiations of 10 different wavelength . The value of lambda is nearly :

AAKASH INSTITUTE ENGLISH-THERMAL PROPERTIES OF MATTER-Assignment (Section-A) Objective Type questions (one option is correct)
  1. The dimensions of thermal resistance are

    Text Solution

    |

  2. The temperature of water at the surface of a deep lake is 2^@C. The te...

    Text Solution

    |

  3. A body of length 1 m having cross sectional area 0.75 m^(2) has heat f...

    Text Solution

    |

  4. A cylindrical rod having temperature T1 and T2 at its end. The rate of...

    Text Solution

    |

  5. A slab consists of two parallel layers of two different materials of s...

    Text Solution

    |

  6. The layers of atmosphere are heated through

    Text Solution

    |

  7. The temperarture gradient in a rod of 0.5 m long is 80^(@)Cm^(-1). If ...

    Text Solution

    |

  8. The ratio of the thermal conductivities of two different materials is ...

    Text Solution

    |

  9. Five rods of same dimensions are arranged as shown in figyre. They hav...

    Text Solution

    |

  10. In heat transfer, which method is based on gravitation?

    Text Solution

    |

  11. In which process, the rate of transfer of heat is maximum ?

    Text Solution

    |

  12. Good absorbers of heat are

    Text Solution

    |

  13. A body, which emits radiations of all possible wavelengths, is known a...

    Text Solution

    |

  14. A hot and a cold bofy are kept in vacuum seperated from eavh other. Wh...

    Text Solution

    |

  15. According to ‘Newton’s Law of cooling’, the rate of cooling of a body ...

    Text Solution

    |

  16. A liquid cools down from 70^(@)C to 60^(@)C in 5 minutes. The time tak...

    Text Solution

    |

  17. If a metallic sphere gets cooled from 62^(@)C to 50^(@)C in minutes ...

    Text Solution

    |

  18. Newton's law of cooling is used in laboratory for the determination of...

    Text Solution

    |

  19. It takes 10 minutes to cool a liquid from 61^(@)C to 59^(@)C. If room ...

    Text Solution

    |

  20. A block of metal is heated to a temperature much higher than the room ...

    Text Solution

    |