valosäteily

Valosäteily refers to electromagnetic radiation within the visible spectrum, typically ranging from approximately 400 to 700 nanometers in wavelength. This portion of the electromagnetic spectrum is what the human eye can detect and interpret as light. Different wavelengths within this range are perceived as different colors, with shorter wavelengths corresponding to violet and blue, and longer wavelengths corresponding to red and orange. Sunlight is a primary source of visible light, but it is also emitted by artificial sources such as incandescent bulbs, LEDs, and fluorescent lamps. The intensity of valosäteily can vary greatly, influencing how bright an object appears. Valosäteily plays a crucial role in photosynthesis in plants, enabling them to convert light energy into chemical energy. It also impacts human physiology, regulating circadian rhythms and influencing mood. The study of valosäteily and its properties is known as optics.