Observe for yourself that light is made up of all colors of the rainbow! Have you seen the color spectrum from a rainbow outside, from light that passes through a prism, or from light shinning on a DVD? People see white light when all the colors are present at once. As the white light in your home or school shine on various objects, why doesn't everything look white? Materials interact with the light that shines on them. Some light is reflected (as with a mirror) and some is absorbed, just like a sponge absorbs water. The light you see is reflected light or, if looking through a window, transmitted light. One way to see the differences among various materials is by measuring their colors using spectroscopy, the study of the interaction of light and matter. The SpectroClick Kit allows you to see light and a spectrum through a diffraction grating, and see how to measure the colors.
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