Unit 10 yo.

In class today we learned a lot about light. We learned about Snell's law. Snell's law states that when moving from a fast medium to a slower medium, light will bend towards the normals and when moving from a slow medium to a fast medium light will bend away from the normal. We also learned about different types of rays. A parallel ray is from the object parallel to the optic axis through lens and bend through the focal point on the other side. A focal ray is from the object through the focal point on the object side through the lens then parallel. Essential rays go from the object through the center of lens then continue without bending.