Light
Introduction
Without light there would be no vision or color.
Light reflected from objects
around us makes things visible.
Light
Light is a form of electromagnetic radiant energy visible to the human eye.
The visual spectrum, what we see, is only a small part of the entire
electromagnetic spectrum.
Figure 2-1 shows the range of the electromagnetic spectrum.
Figure 2-1.—The position of visible light in the
electromagnetic spectrum.
White light refracted through a prism reveals the colors that comprise the
visible spectrum.
Figure 2-2 shows visible light as refracted through a prism.
Figure 2-2.—The refraction of light by a prism.
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