Unit 10

Today in class learned about light. We learned the definitions for opaque and transparent. Opaque means it doesn't let light through and transparent means light can go through it. The velocity of light is defined as "C" and is equal to 3 x 10^8 m/s. Light is an electromagnetic wave which means it does not need a medium like sound pressure waves. This means that light is faster than sound. We learned about the different frequencies like gamma rays, x-rays, uv radiation. I found it interesting that we learned that you cannot get a tan from sitting in the sun if you are protected by a glass window.

Here is picture of me and my friends with a bunch of sun light.