How did you learn these ideas?
First, we wanted to test the two theories. We put a pencil very close to the smartboard projecter and looked at the shadow on the smartboard. It was very large, but he edges weren't very defined. Next, we put the pencil closer to the smartboard and the shadow was almost actual size, and very clear cut. We took notes about what we saw. Next, we looked at the comparison to Huygens' theory. We went to a still body of water in the classroom and dropped a little bit of water in it. When the drops hit the surface, the waves moved in a circular formation all around the dot. When it reached the side of the pool thing, it bounced off the wall at the same angle it was hit. Finally, the way we tested how light has no mass so that it wouldn't sink when hitting the water, we shined a flashlight on a beam balance and checked to see if the scale moved. When it didn't, we could tell that the light would be weightless.
Knowing how all of this is important in case it comes up in conversations and you don't want to sound like an idiot. Also, if you decide to go down the career path of a scientist or any other form of science, it is important to know things like this to build upon.
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