Light Lets Us See Part 1

​Greeks believed light was a stream of particles that flowed like water.

​1600s, Christian Huygens:

• Developed a THEORY, light is like waves. Moved in straight lines, had tops and bottoms, and could be short of long.

1800s, Thomas Young:

• Designed experiment that proved them right. Shined a light through a narrow slit in a piece of paper.​

​Artificial

• ​Controlled by people

• ​Candles, Light Bulbs, OLEDS, Lasers

​Natural

• ​Cannot be controlled

• ​Sun, Stars, Lightning

​Made up of different colors

​We see whatever color is bounced off of the object.

​When our eyes sense light with all the colors, it sees it as a special color.

• ​That color is white.