Teacher resources and professional development across the curriculum

Teacher professional development and classroom resources across the curriculum

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Teacher's Lab
The Science of Light
Made From Dots
IntroductionLight in ColorLaws of Light

Have you ever looked at a magazine picture through a strong magnifying glass? You will find that it is made up of dots. Here are two pictures of a baby —one as if it were a photographic print, and the other as if it were a magazine photo, blown up 200, 400, and 800 times. (The focus is on the baby's nose.)

zoom picture of baby

A magazine printing press usually can only print four colors: Cyan, Magenta, Yellow, and Black. Our eyes and brain put colors together from the colored dots.

Printers (and the computers they use to help them) print the dots in special grids that do not overlap. On the next page, you will try to match a "magazine" color by building it from dots.



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