Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1][2] Visible light spans the visible spectrum and is usually defined as having wavelengths in the range of 400–700 nanometres (nm), corresponding to frequencies of 750–420 terahertz.
Light is a primary tool for perceiving the world and interacting with it for many organisms. Light from the Sun warms the Earth, drives global weather patterns, and initiates the life-sustaining process of photosynthesis; about 10 22 joules of solar radiant energy reach Earth each day.
Light is a transverse, electromagnetic wave that can be seen by a typical human. Wavelengths in the range of 400–700 nm are normally thought of as light.
In his formulation of electromagnetism, Maxwell described light as a propagating wave of electric and magnetic fields. More generally, he predicted the existence of electromagnetic radiation: coupled electric and magnetic fields traveling as waves at a speed equal to the known speed of light.
Visible light is but one example of a much broader set of phenomena—an electromagnetic spectrum with no theoretical upper or lower limit to frequencies and wavelengths.
Sound Transit 2 light rail Line Station List and Next Departures The Sound Transit 2 light rail line - Lynnwood - Downtown Redmond serves 25 light rail stations in the Seattle area departing from Downtown Redmond and ending at Lynnwood City Center.Scroll down to see upcoming 2 line times at each station and the next scheduled 2 line departure will be displayed. The full 2 line schedule as well ...
In common usage, the term light (or visible light) refers to electromagnetic radiation in a wavelength range that is visible to the human eye (about 400–700 nanometers (nm) (15.7-27.6 millionths of an inch)).
Rays, or beams of light shine through metal patterns into a railway station. Light is a form of electromagnetic radiation. It is natural agent that stimulates sight and makes things easy to see. Light is the opposite of darkness. Light has a wavelength. Some wavelengths can be seen by the human eye. Others cannot. [1] . Many animals can see light.