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?
How does an electron emit a photon of light? Why is there low pressure in a cathode ray tube? How does an electric current produce a magnetic field? How does a magnetic field create electricity? How a magnetic field is produced by moving charges. ...
When electricity is applied to an electroluminescent wire, electrons in the wire's phosphor coating are knocked to a higher energy level or orbital. When these electrons move back to their original energy level, they emit light particles called photons. Only at the point when the electrons ...
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...
An atom's nucleus may attract a speeding electron just enough to alter its course. Like a comet whipping around the sun, the electron slows down and changes direction as it speeds past the atom. This "braking" action causes the electron to emit excess energy in the form of an X-ray ...
When an atom gains or loses energy, the change is expressed by the movement of electrons. When something passes energy on to an atom, an electron may be temporarily boosted to a higher orbital (farther away from the nucleus). The electron only holds this position for a tiny fraction of a...
For electrons to break free of atoms, they need to absorb photons, the particles of electromagnetic radiation, with a certain amount of energy, the "ionization energy." This energy is different depending on what "shell" around an atom the electron occupies. Electrons on the outer shell are th...
Questions remain, however, over durability. So far, the electron-consuming bacteria can survive in Yang’s apparatus for only several weeks. Yang is still focused on understanding their biochemistry. He hopes doing so will help him improve the efficiency of what he calls his “photosynthet...
light packet has a certain amount of energy in it according to its frequency– the higher the frequency, the more energy. If this energy corresponds to one of the electron energy levels, the electron will absorb it and re-emit it as heat. Transparent materials, however, do not absorb the...
The number of electrons emitted from the heated material per unit area is related to the absolute temperature as well as a constant 'b' that is a constant indicating the work an electron has to do to escape the surface.As a result it is possible to derive an equation for the...