The atoms in a standard silicon diode, for example, are arranged in such a way that the electron drops a relatively short distance. As a result, the photon's frequency is so low that it's invisible to the human eye – it's in the infrared portion of the light spectrum. This isn't...
Since they're unstable, the atoms quickly return to their normal state—and give off the energy they had as light. (Read more about how and why this happens in our longer article about light.) Sometimes we can see the light that atoms produce and sometimes not. If the light they ...
As the fire pumps energy into the iron, the iron atoms become "excited" and unstable, and their electrons absorb the energy briefly, then hurl it back out again in the form of light particles known as photons. Hotter things hurl out relatively more light of higher frequency and higher ...
If atoms exist, why can't we see them with visible light? When electrons travel, do they produce and/or carry electricity? How does a van de graaff work? What happens to the settling velocity if the density of the particles increases?
How does radiation turn into light? How is dark matter created? How does an electron emit a photon of light? How did Isaac Newton discover the spectrum of light? How does light propagate in a medium? How do atoms create photons?
Atoms are the basis of all the elements in the universe, the building blocks of all visible matter, and the secret to nuclear power.
The atoms in a standard silicon diode, for example, are arranged in such a way that the electron drops a relatively short distance. As a result, the photon's frequency is so low that it's invisible to the human eye – it's in the infrared portion of the light spectrum. This isn't...
energies because they consist of multiple atoms. They have quantized vibrational and rotational energy levels and thus emit light with certain wavelengths that correspond to these levels. Molecular spectra exist over a wider range than atomic line spectra and thus give stronger bands of light. ...
Light Trespass: Your neighbors might know better than to hop over your fence in the middle of the night, but do they know enough not to leave all their lights on -- inside and out -- in anticipation of a late night out? That sort of scenario is what light trespass is all about, an...
Both methods use three-level cascade systems with the uppermost state being the Rydberg one where the atoms are excited and cooled. Very high fraction of atoms can be cooled to subrecoil temperatures by the use of VSCPT in standing light waves.E.Korsunsky...