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8 terms
Photonics Dictionary: N
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charge x
N x
N-type material
A quadrivalent semiconductor material, with electrons as the majority charge carriers, that is formed by doping with donor atoms.
nanotube
A nanotube, also known as a nanotubule or simply a tube-like structure, is a nanoscale cylindrical structure composed of various materials, including carbon, boron nitride, or other compounds....
negatron
A negatively charged elementary particle. See electron.
neon tube
An electron tube containing neon gas that uses the transmission of an electric current through the gas to ionize the neon and produce a luminous red discharge.
nonionizing radiation
Radiation that does not produce free electrons and ions, or electrically charged particles.
nonthermal radiation
The radiation emitted from a group of charged particles that does not depend on the temperature of the source in which those particles are generated.
nuclear quadrupole resonance spectroscopy
A chemical detection technique used to measure molecules that have a magnetic dipole moment. The analysis is directed to nucleuses which have a quadrupole moment which leads to an asymmetric electric...
nuclear track emulsion
A photographic emulsion of the silver-halide type that is used to record the path of a charged traveling particle. The tracks recorded on these emulsions are typically observed under a microscope...
Photonics Dictionary
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