VOCABULARY 2

1. OPAQUE: a material that do not let light pass through them.
The book is an opaque material.

2. TRANSPARENT: a material that let all the light pass through them.
The glass is a tranparent material.

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

4. Polarization: allowing light vibratios 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 the edges)and brings lights rays together.

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