Man illuminates electromagnetic waves using coffee cans and LEDs, Christmas-colored science ensues (Engadget)
Electromagnetic radiation is all around us, but we’re largely unaware that our
bodies are constantly bathed in waves of the stuff because our eyes aren’t
equipped to see it. Dr. Gregory Chavat decided to give us a glimpse of an EM
waveform, however, by using a coffee can radar system, a couple of LEDs, and
long-exposure photography. The setup consisted of a radar emitter made out of
one coffee can and a second can with a couple of LEDs attached to serve as a
tethered receiver antenna. Those LEDs were then set to that light up red or
green to illuminate the EM wave peaks and valleys. By moving the receiver
closer and further away from the emitter while taking a long exposure photo,
the good doctor was able to capture the wavefront radiating on film, and let
you see the unseen with a bit of Christmas-colored flair. Check the video
below for a fuller explanation, and hit the more coverage link to learn how to
build a coffee-can radar and perform some basement black magic yourself.
Continue reading _Man illuminates electromagnetic waves using coffee cans and
LEDs, Christmas-colored science ensues_
Man illuminates electromagnetic waves …
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