vocabulary 2

Opaque:Completely blocking linght passing through.

Transparent: letting all light through, so that objects on the othre side can be seen clearly.

Translucent: letting only some light through, so that objects on the other side appear blurry.

Polarization: allowing light vibration to pass trough in only one direction.

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

Convex lens: a lens that curves outward(is thicker at the middle than at the edges) and brigs light rays together.

concave lens: a lens that curves inward ( is thicker at the edges than at the middle) and spreads light rays apart.