Electromagnetic radiation within the portion of the electromagnetic spectrum that can be perceived by the human eye constitutes a form of energy. This radiant energy, typically ranging in wavelengths from approximately 380 to 750 nanometers, exhibits properties of both waves and particles. Visible electromagnetic radiation is emitted by sources such as the sun, light bulbs, and fires, and it interacts with matter, enabling sight and various photochemical processes. An example is the illumination provided by a lamp, which allows us to see objects in a darkened room.
This form of energy is crucial for life on Earth, driving photosynthesis in plants, which forms the base of most food chains. It also plays a significant role in human health, influencing vitamin D production and circadian rhythms. Historically, the study of this phenomenon has led to groundbreaking discoveries in physics, including the wave-particle duality and the development of quantum mechanics. Its efficient harnessing and utilization are paramount for advancements in renewable energy technologies, such as solar power.