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Questioning the Universe
book

Questioning the Universe

by Ahren Sadoff
December 2008
Beginner content levelBeginner
224 pages
7h 44m
English
Chapman and Hall/CRC
Content preview from Questioning the Universe
178 Questioning the Universe: Concepts in Physics
14.6.1 TWO CLASSES OF MATTER PARTICLES
Note that in the description above, electrons were not indicated as being composed
of quarks. They are not. In fact, they, and other particles like them, form a separate
class of fundamental particles known as leptons, which is derived from the Greek
leptos, meaning “ ne” or “small.” They interact via the weak nuclear force. Since
some of them are charged, like the electron, they also interact via the electromag-
netic force. Figure 14.5 shows a chart of the quarks and leptons. Let us consider the
similarities and differences between these two types.
14.
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Publisher Resources

ISBN: 9781420082593