radiation pressure

radiation pressure

Pressure on a surface resulting from electromagnetic radiation that impinges on it. The pressure is a result of the momentum carried by the radiation. When radiation is reflected rather than absorbed, the radiation pressure is doubled. Radiation pressure can sometimes be great enough to produce a force that is useful.

This entry comes from Encyclopædia Britannica Concise.
For the full entry on radiation pressure, visit Britannica.com.

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