O Physics: Bose-Einstein Condensates and Laser Cooling

In summary: Hmm, I'm actually looking at the concept of laser cooling. At Bose-Einstein condensate the atom loses its individual identity, is it possible to reverse this process for atom to form again?This is quite a different question. You should start a new thread for this.
  • #1
fredreload
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Heat is a type of energy that is transferable and increases thermal energy. Thermal energy is being released as infrared radiation hence the term heat vision. Does that mean heat is capable of producing so called black body radiation here. Is the infrared radiation caused by the photon emission of the objects or something else?
 
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  • #2
fredreload said:
Heat is a type of energy that is transferable and increases thermal energy. Thermal energy is being released as infrared radiation hence the term heat vision. Does that mean heat is capable of producing so called black body radiation here. Is the infrared radiation caused by the photon emission of the objects or something else?
The human body will radiate energy and the frequency/energy spectrum of that radiation will be determined by the laws of blackbody radiation (Planck's law). The Wien's displacement law relates the peak wavelength of the radiation to the temperature of the blackbody. In the case of the human body which has a temperature of 37°C or 310K, the peak wavelength will be about 10 microns or 10,000 nm which is within the infrared range. Almost all radiation will be in the infrared region but there will be some very small amount of visible radiation.

The actual mechanism by which the photons are emitted or absorbed by groups of atoms is rather complex. Groups of atoms can absorb or emit photons by acting collectively and this involves phonon behaviour. Suffice it to say that groups of connected molecules that are moving about due to thermal motion will radiate electro-magnetic energy.

AM
 
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  • #3
Hmm, I'm actually looking at the concept of laser cooling. At Bose-Einstein condensate the atom loses its individual identity, is it possible to reverse this process for atom to form again?
 
  • #4
It seems possible for it to return to its original state here.
 
  • #5
fredreload said:
Hmm, I'm actually looking at the concept of laser cooling. At Bose-Einstein condensate the atom loses its individual identity, is it possible to reverse this process for atom to form again?
This is quite a different question. You should start a new thread for this.

AM
 

FAQ: O Physics: Bose-Einstein Condensates and Laser Cooling

1. What is heat?

Heat is a form of energy that is transferred from one object or system to another due to a difference in temperature. It is the result of the movement of particles within a substance, and can be measured in units of joules (J).

2. What is black body radiation?

Black body radiation is the electromagnetic radiation emitted by a perfect absorber and emitter of energy, known as a black body. It is characterized by a continuous spectrum of wavelengths and is dependent on the temperature of the body.

3. How is heat related to black body radiation?

Heat and black body radiation are closely related because black bodies emit and absorb heat energy in the form of electromagnetic radiation. The amount and type of radiation emitted is dependent on the temperature of the black body.

4. What is the Stefan-Boltzmann law?

The Stefan-Boltzmann law is a physical law that states the total radiant heat energy emitted from a black body is directly proportional to the fourth power of its absolute temperature. This means that as the temperature of a black body increases, the amount of radiation it emits increases exponentially.

5. What is the significance of black body radiation in science and technology?

Black body radiation has significant implications in various fields of science and technology. It is used in astronomy to study the temperature and composition of celestial bodies, and in thermodynamics to understand the behavior of gases and solids. It also has practical applications in areas such as thermal imaging, solar energy, and LED technology.

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