EN: Radiant energy is energy carried by electromagnetic radiation (waves/photons). - It includes visible light, infrared, and ultraviolet. - When absorbed by matter, radiant energy often transforms into thermal energy.

中文：辐射能是由电磁辐射（电磁波/光子）携带的能量。 - 包括可见光、红外线、紫外线等。 - 被物质吸收后常转化为热能。