ABSTRACT
As engineers we will be concerned primarily with energy transport via radiation but we can also transfer momentum to a lesser extent [1, 2]. The latter is the force behind laser trapping of atoms, laser tweezers for manipulating cells or colloids, and solar sails for powering spacecraft. Our focus will primarily be on heat transfer by radiation, but it is important to realize that electromagnetic energy and potential energy (gravity) is also transported via radiation. In fact, we cannot divorce heat transfer from the transfer of electromagnetic energy because the heat we feel transported by radiation is merely a manifestation of the interaction of that electromagnetic radiation with matter. In this chapter we discuss heat transport via radiation from a fundamental viewpoint and then from a more useful, engineering approach.
