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bertietaylor wrote:>Volney wrote:>
>
Even solar sails use that effect (momentum of sunlight).
No that is a heat engine. Temperature differences on either side cause
the motion. Radiant heat is em waves raising the temperature on one side,
that facing the sun.
>
@bertietaylor a.k.a @ArindamBanerjee,
You are confusing the action of the Crookes' radiometer with Nichols'
radiometer.
https://en.wikipedia.org/wiki/Crookes_radiometer
Crookes' radiometer is a heat engine that uses a light source as the
source of (radiant) heat, and a working substance, air.
https://en.wikipedia.org/wiki/Nichols_radiometer
Nichols' radiometer measures radiation pressure caused by light
momentum. The concept of photons are not required to explain this
momentum, Maxwell's wave theory is sufficient.
https://en.wikipedia.org/wiki/Radiation_pressure
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