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en.wikipedia.org/wiki/Visible_spectrum

The visible spectrum is the portion 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. A typical human eye will respond to wavelengths from about 390 to 700 nm.

science-edu.larc.nasa.gov/EDDOCS/Wavelengths_for_Colors.html

Feb 7, 2017 ... This "visible light" corresponds to a wavelength range of 400 - 700 nanometers ( nm) and a color range of violet through red. The human eye is ...

www.livephysics.com/physical-constants/optics-pc/wavelength-colors

Approximate wavelength (in vacuum) For the various colors. ... Color, Wavelength (nm) ... The image below shows light's visible spectrum, which runs from violet to red. You might recognize the spectrum as the order of colors in a rainbow.

www2.chemistry.msu.edu/faculty/reusch/virttxtjml/spectrpy/uv-vis/spectrum.htm

Visible wavelengths cover a range from approximately 400 to 800 nm. ... Thus, absorption of 420-430 nm light renders a substance yellow, and absorption of ...

hyperphysics.phy-astr.gsu.edu/hbase/ems3.html

The wavelength range is from about 1 millimeter down to 750 nm. ... In interactions with matter, visible light primarily acts to elevate electrons to higher energy ...

physics.tutorvista.com/waves/wavelength-of-light.html

As already discussed, the Wavelength of Visible Light ranges from 400 – 700 nm. In this section let us discuss wavelength of different colours of the visible ...

www.excelitas.com/Pages/Product/Visible-Light-400-nm-750-nm.aspx

Avalanche Photodiodes APD for Visible Light 400 nm-750 nm · Imaging ... at visible photons for fluorescence measurements, long-wavelength infrared for ...

www.physicsclassroom.com/class/light/Lesson-2/The-Electromagnetic-and-Visible-Spectra

This visible light region consists of a spectrum of wavelengths that range from approximately 700 nanometers (abbreviated nm) to approximately 400 nm.

hubblesite.org/reference_desk/faq/answer.php.id=70&cat=light

Gamma rays have the shortest wavelengths, < 0.01 nanometers (about the size ... Visible light covers the range of wavelengths from 400 – 700 nm (from the size ...

www.livescience.com/50678-visible-light.html

Apr 30, 2015 ... Generally, visible light is defined as the wavelengths that are visible to ... of the visible spectrum, having a longer wavelength, about 740 nm, ...