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Radiation Drag on Moving Oscillator Derived

In the Einstein-Hopff treatment, motion through a thermal radiation field produced a friction-like drag on an oscillator, linking electromagnetic fluctuations with Brownian-style dynamics.

Albert Einstein in his Berlin office around 1920
Albert Einstein in his Berlin office, about 1920. Unknown photographer — public domain. Wikimedia Commons source.
Year 1910ZurichPhysics

Radiation Drag on Moving Oscillator Derived

1910 · Zurich · Switzerland · Physics

In the Einstein-Hopff treatment, motion through a thermal radiation field produced a friction-like drag on an oscillator, linking electromagnetic fluctuations with Brownian-style dynamics.