vocabulary 12

opaque: completely blocking light from passing trhough.

transparent: letting all light trough,so that objects on the other side can be seen clearly.

translucent: letting only some light trough,so that objects on the other side can be seen blurry.

polarization: allowing light viobrations to pass trough in only one direction.

refraction: the bending of light rays as they pass from one subtance into another.

convex lens: a lens that curves outward and brings light rays together.

concave lens: a lens that curbves inward and spreads light rays apart.