# Bose, Satyendra Nath (1894–1974)
Indian physicist and mathematician who contributed significantly
to the theory of quantum mechanics and
statistical mechanics. Bose
made the initial advances to describe the statistical properties of certain
elementary particles, now called bosons. These
particles, which include all those that mediate force (like the photon
which carries the electromagnetic force) all have the property that any
number of them can occupy the same quantum state: that is, they do not obey
the Pauli exclusion principle. Bose's work
was further developed by Einstein, with
whom Bose collaborated, and the statistics which such particles obey is
now called Bose-Einstein statistics.
Bose also worked on X-ray diffraction, electrical properties of the ionosphere,
and thermoluminescence. ## Related category
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