Black Body Radiation: Why Objects Emit Different Wavelengths

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Discussion Overview

The discussion centers on the phenomenon of black body radiation, specifically addressing why objects emit radiation at different wavelengths for a given temperature. The scope includes conceptual understanding and technical explanations related to thermal radiation and its dependence on temperature.

Discussion Character

  • Exploratory, Conceptual clarification

Main Points Raised

  • One participant questions how an object can emit radiation of different wavelengths at a constant temperature.
  • Another participant suggests that thermal motions and various degrees of freedom contribute to the emission of energy at a range of frequencies.
  • A further contribution emphasizes that temperature represents a macroscopic average of many microscopic particles, which can be likened to the varied conversations in a crowded room.

Areas of Agreement / Disagreement

Participants express similar doubts regarding the emission of different wavelengths at a given temperature, but there is no consensus on the explanation or underlying mechanisms.

Contextual Notes

The discussion does not resolve the assumptions regarding the relationship between temperature and wavelength emission, nor does it clarify the definitions of key terms involved in black body radiation.

arun.vak1103
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why or how does an object emit radiation of different wavelength for a given temperature?
 
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Google for "black body radiation", read what you find there, and if you have more specific questions or need help with some point, come back with a more focused questiojn - you'll get better answers faster that way.
 
The doubt is, how can a body emit radiations of different wavelength, for a given temperature ?
 
The thermal motions and other degrees of freedom occur at a wide variety of frequencies, and so energy is emitted at a variety of frequencies.
 
arun.vak1103 said:
The doubt is, how can a body emit radiations of different wavelength, for a given temperature ?

Temperature is a sort of macroscopic average across a very large number of microscopic particles doing very different things. Think of the steady buzz of conversation you hear in a crowded room when many different people are having many different conversations in many different tones of voices.
 

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