Can heat move from one body to another by radiation?

Heat can indeed move from one body to another by radiation, which is the transfer of heat energy through electromagnetic waves. This process does not require a medium, allowing heat to be transferred even through a vacuum, such as the heat from the sun reaching the Earth. Unlike conduction, which requires direct contact, or convection, which involves the movement of fluids, radiation occurs through the emission of infrared radiation. Any object that is at a temperature above absolute zero emits some level of thermal radiation, allowing heat transfer through this mechanism irrespective of the states of matter involved. This principle is fundamental in understanding how heat flows in various environments, including attics where proper ventilation is crucial to managing temperature and preventing moisture buildup.