Quotation from: General Science

Written by: Bertha M. Clark


The exquisite tints of the rainbow can be seen if we look at an object
through a prism or chandelier crystal, and a very simple experiment
enables us to produce on the wall of a room the exact colors of the
rainbow in all their beauty.


[Illustration: FIG. 86.--White light is a mixture of lights of rainbow
colors.]


127. How to produce Rainbow Colors. _The Spectrum._ If a beam of
sunlight is admitted into a dark room through a narrow opening in the
shade, and is allowed to fall upon a prism, as shown in Figure 86, a
beautiful band of colors will appear on the opposite wall of the room.
The ray of light which entered the room as ordinary sunlight has not
only been refracted and bent from its straight path, but it has been
spread out into a band of colors similar to those of the rainbow.

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