Page "Electromagnetic radiation" Paragraph 74

Infrared radiation in the spectral distribution of a black body is usually considered a form of heat, since it has an equivalent temperature, and is associated with an entropy change per unit of thermal energy.

However, the word " heat " is a highly technical term in physics and thermodynamics, and is often confused with thermal energy.

Any type of electromagnetic energy can be transformed into thermal energy in interaction with matter.

Thus, any electromagnetic radiation can " heat " ( in the sense of increase the thermal energy termperature of ) a material, when it is absorbed.