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Reference.org
Poynting effect
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<p>The Poynting effect may refer to two unrelated physical phenomena. Neither should be confused with the <a href="/facts/Poynting%E2%80%93Robertson_effect/aAl6CMVw">Poynting–Robertson effect</a>. All of these effects are named after <a href="/facts/John_Henry_Poynting/EFGQqo61">John Henry Poynting</a>, an English physicist. </p>