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Electromagnetic radiation in this range of wavelengths is called visible light (or simply light). The optical spectrum is sometimes considered to be the same as the visible spectrum, but some authors define the term more broadly, to include the ultraviolet and infrared parts of the electromagnetic spectrum as well, known collectively as optical ...
We’ve picked out some of the most interesting posts from the Be Amazed subreddit. All 8.3 million members share a fascination for people, places, and events that have made a mark throughout history.
The United States Department of Veterans Affairs was an early adopter of a standardized approach to incorporating visible light images into the electronic medical record [7]. Increasingly, visible light imaging is being deployed beyond individual departments, as part of a trend referred to as Enterprise Imaging [8].
Up until the 1940s, astronomers could only use the visible and near infrared portions of the optical spectrum for their observations. The first great astronomical discoveries such as the ones made by the famous Italian polymath Galileo Galilei were made using optical telescopes that received light reaching the ground through the optical window ...
The gold-plated ultraviolet camera is brightly visible next to the moon lander in this assembled panorama shot taken on the Apollo 16 mission. In April 20, 1972, the Apollo 16 mission with the Far Ultraviolet Camera/Spectrograph designed by Carruthers landed on the moon. This was the first telescope set up on another planetary body and was a ...
Light, visible light, or visible radiation is electromagnetic radiation that can be perceived by the human eye. [1] 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 .
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