The Wikipedia Wizards are working wonders with human colour perception.
According to the Carl Zeiss web site the visible spectrum “covers the wavelength spectrum between 380 nm and 780 nm.”
The visible area is the range of electromagnetic radiation that is visible to the human eye.
It covers the wavelength spectrum between 380 nm and 780 nm.
Zeiss – Spectrometer Modules For the UV to the NIR wavelength range
Back in 2004 the Wikipedia Wizards agreed with Carl Zeiss although they added the caveat that “400 nm to 700 nm” was “more common”.
The optical spectrum (visible light or visible spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye.
The optical spectrum is a composite, or mixture, of the various colors.
There are no exact bounds to the optical spectrum ; a light-adapted eye typically has a maximum sensitivity of ~555 nm…
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