2. ENERGY THAT TRAVELS IN A STRAIGHT LINE.

5. LIGHT TAKEN IN BY AN OBJECT AND NOT REFLECTED OR REFRACTED.

6. LIGHT THAT PASSES THROUGH

7. NO LIGHT GOES THROUGH IT.

8. ALL LIGHT GOES THROUGH IT.

9. SOME LIGHT GOES THROUGH IT.

10. THE TYPE OF LENS THAT IS THINNER IN THE MIDDLE.

11. THE TYPE OF LENS THAT IS THICKER IN THE MIDDLE.

17. A transparent, three dimensional shaped used to separate white light into a color spectrum

18. Energy waves hit a rough or uneven surface and the waves are reflected in all directions.