The temperature-dependent emission of electromagnetic waves. Combine this tag with the [thermodynamics] tag for a macroscopic view or the [quantum-mechanics] tag for a microscopic explanation.

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### How would a three dimensional standing wave created inside a box look like?

While deriving Rayleigh-Jeans law, in order to make a standing inside a cube, a condition is put forward which says electric field must vanish when the EM wave hits a surface of the cube. I want to ...
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### Cavity and black body radiation

If one speaks of the fact that one gets blackbody radiation in good approximation by a cavity with hole, does one mean as blackbody this hole, i.e. the place where the radiation exits from the cavity? ...
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### Physics of the convection oven

I don't understand how convection ovens can cook food faster than radiant heat ovens. Guides to convection ovens claim that they cook food 25-30% faster than radiant heat ovens, but do not really ...
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1 vote
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### What do Maxwell's equations tell us about the ultraviolet catastrophe?

I have found it that in elementary discussions of black-body radiation, other than justifying electromagnetic waves should exist from Maxwell's equations, those equations are not used for anything ...
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15 views

### How to add markers to IR photographs

I'm using an IR camera to identify thermal patterns. The thermal images are similar to this [LINK] image. I'd like to add markers to the area being measured to determine dimensions and normalize the ...
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1 vote
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### The entropy given by stefan Boltzmann's law looks remarkably similar to the volume of the sphere; $S(T)=\frac{4}{3}\sigma T^3$

If I am not mistaken the entropy for a blackbody per unit area is given by: $$S(T)=\frac{4}{3}\sigma T^3.$$ The volume of a sphere is given by: $$V(r) =\frac{4}{3}\pi r^3.$$ Is this coincidental? I ...
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1 vote
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### Quantifying how much would Jupiter heat up if you accelerate Jupiter out of orbit around the sun using fusion candles? [closed]

So, I responded to a post of someone saying that you could turn Jupiter into a spaceship using fusion candles. I mentioned that doing so would dramatically heat up the planet, especially if you were ...
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### Is cooling by infrared absorbing rectenna possible?

We know that every hot objects emits IR radiation. We also know that plasmonic rectenna can absorb and convert IR radiation to electricity. Question: what will happen if we put an hot object inside a ...
14 views

### Is spectral radiancy same of a blackbody radiation for area element $dA$ imagined in different orientation?

Spectral emissive power $e$ is defined as the power emitted through per unit area per unit frequency. And spectral radiancy $f$ (frequency, $T$) is the energy falling perpendicular to a unit area per ...
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### How was the black body intensity vs wavelength (or frequency) radiation curve historically produced?

I have read that Wilhelm Wien gave his formula to match the radiation curve of a black body as shown in the picture; which works well in high frequency region. Another formula by Rayleigh-Jeans is ...
33 views

### Peak of energy and black body

The tungsten filament of an incandescent light bulb has a temperature of approximately 3000 K. The emissivity of tungsten is approximately 1/3, and you may assume that it is independent of wavelength. ...
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