Black-Body Radiation Quiz

Black-body radiation is the thermal electromagnetic radiation within, or surrounding, a body in thermodynamic equilibrium with its environment, emitted by a black body (an idealized opaque, non-reflective body).

The specific, continuous spectrum of wavelengths of black-body radiation is determined by intensity and is inversely related to intensity, depending only on the body's temperature.

A perfectly insulated enclosure in thermal equilibrium internally can emit blackbody radiation through a hole in its wall, provided the hole is small enough to have a negligible effect upon the equilibrium.

<p>The thermal radiation emitted by many ordinary objects can be approximated as blackbody radiation.</p> Signup and view all the answers

<p>Blackbody radiation is a good first approximation for the energy emitted by planets and stars, including the Earth and Sun, despite them not being in thermal equilibrium with their surroundings.</p> Signup and view all the answers