In a dark room, stand more than a meter (more than three feet) away from a blank wall. Tape the hair, as tight as you can, at the top and bottom of your frame, so that the hair runs through the middle of the inside cutout.Ĥ. In my case, each hair had to be at least 5 centimeters long to make sure I could tape it at both ends.ģ. Make sure it is long enough to tape at both ends of your inside rectangle. Take a human hair, maybe from your own head, or from a willing volunteer. My inside cutout was about one centimeter (0.39 inches) wide and four centimeters (1.5 inches) tall.Ģ. I cut a square of cardboard about 15 centimeters (roughly six inches) wide, and then cut a small rectangle inside it. Here, Chris Crockett holds one of my hairs. To find the width of a human hair, start by taping your hair into a small cardboard frame. Then I measured how they scattered the light from a laser pointer with the help of fellow writer Chris Crockett. Using a useful video with instructions from the Frostbite Theatre YouTube series at the Department of Energy’s Jefferson Lab in Newport News, Va., I decided to see if I could measure the hairs of some of the writers here at the Science News office. All you need is a dark room, a laser pointer, some cardboard, tape and a little bit of math. You can measure the width of a single hair. You can repeat the steps here and compare your results - or use this as inspiration to design your own experiment. This article is one of a series of Experiments meant to teach students about how science is done, from generating a hypothesis to designing an experiment to analyzing the results with statistics.
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