"Visible light covers the range of wavelengths from 400 – 700 nm. This is the only region in spectrum that human eyes are sensitive to. The Sun emits the most radiation in the visible portion of the spectrum. Each individual wavelength within the spectrum of visible light wavelengths is representative of a particular color. Light at the lower end of the visible spectrum, having a longer wavelength, about 740 nm, is seen as red; light in the middle of the spectrum is seen as green; and light at the upper end of the spectrum, with a wavelength of about 380 nm, is seen as violet. When all the wavelengths of the visible light spectrum strike your eye at the same time, white is perceived. The visible portion of the spectrum is used extensively in remote sensing and is the energy that is recorded using photography." (Humboldt State University, 2014)


"Electromagnetic Spectrum". Humboldt State Geospatial Online, Humboldt State University. 2014.….
Accessed February 1, 2019.

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