Question: When electromagnetic radiation strikes perpendicular to a flat surface, a totally absorbing surface feels radiation pressure Io/c, where Io is the intensity of incident

When electromagnetic radiation strikes perpendicular to a flat surface, a totally absorbing

When electromagnetic radiation strikes perpendicular to a flat surface, a totally absorbing surface feels radiation pressure Io/c, where Io is the intensity of incident electromagnetic radiation. A totally reflecting surface feels twice that pressure. More generally, a surface absorbs a proportion e of the incident radiation and reflects a complementary proportion, 1-e, where e is the emissivity of the surface. Note that 0

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