What is the thermal radiation light source and what are its characteristics?

Thermal radiation light source is a light source that converts thermal energy into light energy when the luminous object is in thermal balance.

Thermal radiation light source is a kind of incoherent light source, which converts thermal energy into light energy when the luminous object is in thermal balance, such as incandescent lamp, tungsten halogen lamp and so on. All thermal light sources belong to thermal radiation sources. Include the sun, blackbody radiation, etc. It is characterized by producing a continuous spectrum.

Absolute blackbody is an ideal heat radiation source. The so-called absolute blackbody (hereinafter referred to as blackbody) is an object with the following typical characteristics: for incident radiation of any wavelength, its spectral absorption rate is equal to 1, transmittance is 0, and reflectivity is 0.

The strong absorber must be a strong radiator, so the black body has the strongest heat radiation ability.