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Sunlight or White Light

Simple Science

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Sunlight or White Light

Color:
White light or sunlight can be dispersed or separated into the primary colors or rainbow hues, as shown in the preceding Section. What seems even more wonderful is that these spectral colors can be recombined so as to make white light.

If a prism B exactly similar to A in every way is placed behind A in a reversed position, it will undo the dispersion of A, bending upward the seven different beams in such a way that they emerge together and produce a white spot on the screen. Thus we see, from two simple experiments, that all the colors of the rainbow may be obtained from white light, and that these colors may be in turn recombined to produce white light.

White light is not a simple light, but is composed of all the colors which appear in the rainbow.


FIG. - Rainbow colors recombined to form white light.


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