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7 terms
Photonics Dictionary: B
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particles x
B x
beam
1. A bundle of light rays that may be parallel, converging or diverging. 2. A concentrated, unidirectional stream of particles. 3. A concentrated, unidirectional flow of electromagnetic waves.
beta-ray spectrometer
An instrument for the detection of the energy distribution of b-particles and secondary electrons.
biostimulation
The action of a biological system responding to a single or multiple coherent particles of light produced from a laser source. Examples of laser biostimulation include: retinal interaction of light...
Bose-Einstein condensate
A Bose-Einstein condensate (BEC) is a state of matter that forms at temperatures close to absolute zero. It is named after Satyendra Nath Bose and Albert Einstein, who independently predicted the...
Brownian motion
The behavior of microscopic solid particles suspended in a fluid, first observed by botanist Robert Brown in 1827 as a continuous random motion.
bubble chamber
A large tank filled with liquid hydrogen, with a flat window at one end and complex optical devices for observing and photographing the rows of fine bubbles formed when a high-energy particle...
bubble chamber photography
The photographic recording of gas bubbles produced when particles traverse liquid hydrogen in a bubble chamber.
Photonics Dictionary
B
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