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Radiation Pressure

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Published: 10 Aug 2025 › Updated: 10 Aug 2025

Radiation Pressure

"acoustic radiation pressure, where sound waves exert a force on objects in their path."
https://audiodramaproduction.com/audio-terms-glossary/acoustic-levitation/

"radiation pressure, the pressure on a surface resulting from electromagnetic radiation that impinges on it, which results from the momentum carried by that radiation; radiation pressure is doubled if the radiation is reflected rather than absorbed."
https://www.britannica.com/science/radiation-pressure

"A much less familiar feature of electromagnetic radiation is the extremely weak pressure that electromagnetic radiation produces by exerting a force in the direction of the wave. This force occurs because electromagnetic waves contain and transport momentum."

"Maxwell predicted that an electromagnetic wave carries momentum. An object absorbing an electromagnetic wave would experience a force in the direction of propagation of the wave. The force corresponds to radiation pressure exerted on the object by the wave. The force would be twice as great if the radiation were reflected rather than absorbed.

Maxwell’s prediction was confirmed in 1903 by Nichols and Hull by precisely measuring radiation pressures with a torsion balance."
https://phys.libretexts.org/Bookshelves/University_Physics/University_Physics_(OpenStax)/University_Physics_II_-Thermodynamics_Electricity_and_Magnetism(OpenStax)/16%3A_Electromagnetic_Waves/16.05%3A_Momentum_and_Radiation_Pressure

"If a wave is completely reflected, then the force will be double (since the momentum of the wave needs to change by
2
×
2× the amount).*
https://www.mit.edu/~ashrstnv/radiation-pressure.html

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