480nm

480nm refers to a specific wavelength of light, measuring 480 nanometers. This wavelength falls within the blue portion of the visible light spectrum, leaning towards the greenish-blue or cyan end. Visible light is electromagnetic radiation that human eyes can perceive, and it ranges roughly from 400nm (violet) to 700nm (red). Wavelengths around 480nm are often associated with certain natural phenomena and have various applications.

In nature, the sky appears blue due to the scattering of sunlight by the Earth's atmosphere, a process known as Rayleigh scattering. Shorter wavelengths, like blue and violet light, are scattered more effectively than longer wavelengths. While violet is scattered even more, the human eye is more sensitive to blue light, leading us to perceive the sky as blue. Sunlight also contains components in the 480nm range.

In technology, light at 480nm is utilized in several fields. It is a common wavelength for certain types of LEDs, used in displays, lighting, and medical devices. In phototherapy, blue light, including wavelengths around 480nm, can be used to treat conditions like neonatal jaundice by helping to break down bilirubin in the blood. It also plays a role in some industrial processes and scientific research, where specific wavelengths are needed for excitation or detection.