Home
Class 12
PHYSICS
Following graph shows the correct variat...

Following graph shows the correct variation in intensity of heat radiations by black body and frequency at a fixed temperature

A

B

C

D

Text Solution

Verified by Experts

The correct Answer is:
C
According to Wien's law `lambda_(m) alpha (1)/(T) implies v_(m) alpha T`. As the temperature of body increases, frequency corresponding to maximum energy in radiation `(v_(m))` increases. Also area under the curve
`intE_(v) dv alpha T^(4)`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE -02|82 Videos

  • GEOMETRICAL OPTICS

    ALLEN |Exercise EXERCISE -03|11 Videos

  • GEOMETRICAL OPTICS

    ALLEN |Exercise SOME WORKED OUT EXAMPLES|84 Videos

  • CURRENT ELECTRICITY

    ALLEN |Exercise EX.II|66 Videos

  • GRAVITATION

    ALLEN |Exercise EXERCISE 4|9 Videos

Similar Questions

Explore conceptually related problems

Explain effect of variation of intensity of incident radiation on photoelectric current.

On which factor the properties of radiations of perfect black body depend ?

According to Einstein's equation of photo-electric effect which of the following graph shows realtion between kinetic energy of electron emitted and frequency of incident radiation?

Which of the following is dimensional formula of intensity of radiation ?

Which of the following graphs correctly represents the variation of beta= -((dV)/(dP))//V with P for an ideal gas at constant temperature

The figure below shows the variation of specific heat capacity (C) of a solid as a function of temperature (T). The temperature is increased continuously form 0 to 500K at a constant rate. Ignoring any volume change, the following statement (s) is (are) correct to a reasonable approximation.

A source of sound emits sound waves at frequency f_(0) . It is moving towards an observer with fixed speed v_(s)(v_(s) lt v where v is the speed in air). If the observer were to move towards the source with speed v_(0) one of the following two graphs (A and B) will give the correct variation of the frequency f heard by the observer as v_(0) is changed, The variation of f with v_(0) is given correctly by :-

A heated body maitained at T K emits thermal radiation of total energy E with a maximum intensity at frequency v. The emissivity of the material is 0.5. If the temperature of the body be increased and maintained at temperature 3T K, then :- (i) The maximum intensity of the emitted radiation will occur at frequency v/3 (ii) The maximum intensity of the emitted radiation will occur at frequency 3v. (iii) The total energy of emitted radiation will become 81 E (iv) The total energy of emitted radiation will become 27 E

Variation of photoelectric current with intensity of light is shown by graph…….

ALLEN -GEOMETRICAL OPTICS-EXERCISE -01
  1. Two different rods A and B are kept as shown in figure . The variation...

    Text Solution

    |

  2. The area of cross-section of rod is given by A= A(0) (1+alphax) where ...

    Text Solution

    |

  3. Following graph shows the correct variation in intensity of heat radia...

    Text Solution

    |

  4. A red star and a green star radiate energy at the same rate which star...

    Text Solution

    |

  5. 250 g of water and equal volume of alcohol of mass 200 g are replaced ...

    Text Solution

    |

  6. The weight of a person is 60 kg . If he gets 10 calories of heat throu...

    Text Solution

    |

  7. Two identical masses of 5 kg each fall on a wheel from a height of 10 ...

    Text Solution

    |

  8. Hailstone at 0^@C from a height of 1 km on an insulating surface conve...

    Text Solution

    |

  9. In figure , heat is added to a pure substance in a closed container ra...

    Text Solution

    |

  10. Objects A and B that are initially separated from each other and well ...

    Text Solution

    |

  11. If H(C) , H(K) andH(F) are heat required to raise the temperature of ...

    Text Solution

    |

  12. Steam at 100^(@)C is passed into 1.1 kg of water contained in a calori...

    Text Solution

    |

  13. Water is used in car radiators as coolant because

    Text Solution

    |

  14. If mass-energy equivalence is taken into account , when water is coole...

    Text Solution

    |

  15. If the intermolecules forces vanish away, the volume occupied by the m...

    Text Solution

    |

  16. A refrigerator converts 100 g of water at 25^(@)C into ice at -10^(@)C...

    Text Solution

    |

  17. Pressure versus temperature graphs of an ideal gas are as shown in fig...

    Text Solution

    |

  18. In a process the density of a gas remains constant. If the temperature...

    Text Solution

    |

  19. The expansion of unit mass of a perfect gas at constant pressure is sh...

    Text Solution

    |

  20. Air is filled at 60^(@)C in a vessel of open mouth. The vessle is heat...

    Text Solution

    |