- The pressure pushing outwards from the centre of a star because of the energy generated at the star’s core which is transmitted out of the star and into space. Radiation pressure counterbalances the gravitational forces due to the star’s mass which tend to make it contract. When the star’s energy production ceases and the radiation pressure is removed, the star will start to collapse.
- The very slight pressure that electromagnetic radiation exerts upon a surface.
- The pressure that a sound wave exerts upon a surface.
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