Vocabulary #2

1.opaque: Complety blocking light from passing through.

2.transparent: Letting all light through, so that objects on the other side can be seen clearly.

3.translucent: Letting only some light through, so that objects on  the other side appear blurry.

4.polarization: Allowing light vibrations to pass through in only one direction.

5.refraction: The bending of light rays as they pass from one substance into another.

6.convex lens: a lens that curves outward (is thicker at the middle than at edges)

7.concave lens: a lens that curves inward (is thicker at the edges than at the middle)