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Results tagged with electromagnetic-radiation
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user 12623
Propagating solutions to Maxwell’s equations in classical electromagnetism and real photons in quantum electrodynamics. A superset of thermal-radiation.
5
votes
Is there something special in the visible part of electromagnetic spectrum?
There is nothing special concerning the visible light from fundamental point of view. You can have the same amount of information in any other part of the spectrum; note, however, that it has to be si …
- 3,009
8
votes
Intensity of light
The light intensity $I$ is the power $P$, that irradiates an area $A$, $I=P/A$, therefore the units $\mathrm{W}\mathrm{m}^{-2}$. This means, that if you have two beams with equal intensities, the area …
- 3,009
1
vote
Why aren't the graphs for black body radiation straight lines?
I think you are confusing several aspects here. First, the energy of a photon depends on its frequency (or wavelength), the overall energy of a wave depends then on its frequency and number of photons …
- 3,009
2
votes
What if $\gamma$-rays in Electron microscope?
I think the main principal problem would be with high transmission of gamma radiation. It is almost unaffected by matter so you cannot imprint information about your sample on it very efficiently. The …
- 3,009
37
votes
Accepted
Why do prisms work (why is refraction frequency dependent)?
Lorentz came with a nice model for light matter interaction that describes dispersion quite effectively. If we assume that an electron oscillates around some equilibrium position and is driven by an e …
- 3,009