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physical object > natural object > particle > secondary cosmic ray |
secondary cosmic ray comparison table |
Subject | has definition | is a kind of |
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particle | Fundamental unit of matter and energy. All may be classed as fermions, which have half-integral spin and obey the exclusion principle, and bosons, which have integral spin and do not obey the exclusion principle. The term particle is metaphoric, in that all subatomic particles also evince aspects of wave-like behavior. | natural object |
secondary cosmic ray | Atomic fragment - mainly muons - produced by collisions between primary cosmic rays and the molecules in Earth's atmosphere. | particle |
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