The emission and transfer of energy through electromagnetic waves or particles. It can occur through various forms of electromagnetic radiation, such as radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Radiation can be natural, such as sunlight, or human-made, like X-rays used in medical imaging. The transfer of heat through radiation involves the emission of thermal radiation from a warmer object to a cooler one without the need for direct contact or a medium. Radiation plays a significant role in various scientific fields, including physics, astronomy, and medical applications.

In the context of a wood pizza oven, radiation refers to the transfer of heat energy through the emission of infrared radiation from the hot surfaces of the oven. The hot surfaces, such as the walls or the glowing embers, emit infrared radiation as electromagnetic waves. This radiant heat travels in straight lines and directly heats the pizza, even without direct contact. The emitted radiation is absorbed by the pizza, raising its temperature and contributing to the cooking process. Radiation plays a crucial role in browning, caramelization, and flavor development in a wood-fired pizza oven, enhancing the overall cooking experience.