- Light - Wikipedia
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 - Simple English Wikipedia, the free encyclopedia
When light hits a transparent object, it passes through it almost completely without making a significant shadow Light is a form of electromagnetic radiation that shows properties of both waves and particles
- Speed of light - Wikipedia
The speed of light in vacuum, often called simply speed of light and commonly denoted c, is a universal physical constant exactly equal to 299,792,458 metres per second (approximately 1 billion kilometres per hour; 700 million miles per hour)
- Visible spectrum - Wikipedia
White light is dispersed by a glass prism into the colors of the visible spectrum The visible spectrum is the band of the electromagnetic spectrum that is visible to the human eye Electromagnetic radiation in this range of wavelengths is called visible light (or simply light)
- Electromagnetic spectrum - Wikipedia
From low to high frequency these are: radio waves, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays The electromagnetic waves in each of these bands have different characteristics, such as how they are produced, how they interact with matter, and their practical applications
- Photon - Wikipedia
A photon (from Ancient Greek φῶς, φωτός (phôs, phōtós) 'light') is an elementary particle that is a quantum of the electromagnetic field, including electromagnetic radiation such as light and radio waves, and the force carrier for the electromagnetic force
- Lighting - Wikipedia
Lighting or illumination is the deliberate use of light to achieve practical or aesthetic effects Lighting includes the use of both artificial light sources like lamps and light fixtures, as well as natural illumination by capturing daylight
- Light | Definition, Properties, Physics, Characteristics, Types . . .
Light is electromagnetic radiation that can be detected by the human eye Electromagnetic radiation occurs over an extremely wide range of wavelengths, from gamma rays with wavelengths less than about 1 × 10 −11 metres to radio waves measured in metres
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