Today I learned about the Doppler Effect. It was invented by Christian Doppler in 1842, a mathematician. Lets say we're walking along a road and a car passes while honking its horn. As it comes toward us the horn is a higher pitch, and when it passes us the horn has a lower pitch. Thats because when an object (that makes light or sound) is still, the sound or light waves spread out in all directions. Though, when that object moves, the front waves the to squish up and getting smaller, thus making the higher pitched horn. Here's an example:
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People have learned how to use this in weather too, they use a Doppler radar. What happens is weather stations will send out microwaves (electromagnetic waves, also the same waves in your microwave) and those waves will go out and hit clouds and storms and will bounce back to the weather station, which will the produce a picture about the information it got from the waves.
A L L I N A L L T H E(doppler effect is pretty)AWESOME
