Try to picture a proton—the minute, positively charged particle within an atomic nucleus—and you may imagine a familiar, textbook diagram: a bundle of billiard balls representing quarks and gluons. From the solid sphere model first proposed by John Dalton in 1803 to the quantum model put forward by Erwin Schrödinger in 1926, there is a storied timeline of physicists trying to visualize the invisible.
from General Physics News - Science News, Physics News, Physics, Material Sciences, Science https://ift.tt/jbMi3NK
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