Definition of Van Allen, James Alfred in English:

Van Allen, James Alfred

Syllabification: Van Al·len, James Alfred
Pronunciation: /van ˈalən
( 1914–2006), US physicist. He used balloons and rockets to study cosmic radiation in the upper atmosphere and showed that specific zones of high radiation were the result of charged particles from the solar wind being trapped in two belts around the earth.

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Word of the day bimble
Pronunciation: ˈbɪmb(ə)l
walk or travel at a leisurely pace