Radiant energy is the energy of electromagnetic waves, which includes visible light, ultraviolet light, and infrared radiation. It travels through space and can be absorbed, reflected, or transmitted by different materials. This form of energy is essential for various processes, such as photosynthesis in plants and the generation of solar power. Sources of radiant energy include the Sun, light bulbs, and radio waves. When radiant energy interacts with matter, it can cause changes, such as heating an object or enabling vision. Understanding radiant energy is crucial in fields like physics, engineering, and environmental science.