OPTICS

2. The production and emission of light by a living organism.
7. Starts with white, the color with no waves being subtracted, and ends in black, with all waves being subtracted.
8. A piece of glass or other transparent substance with curved sides for concentrating or dispersing light rays, used singly (as in a magnifying glass) or with other lenses (as in a telescope).
10. The Ability to make things move or produce a change in materials.
11. A band of colors, as seen in a rainbow, produced by separation of the components of light by their different degrees of refraction according to wavelength.
12. How colors are made by mixing the primary colors red, green, and blue and how those mixed colors are perceived.
13. Having an outline or surface that curves inward like the interior of a circle or sphere.
14. Light emitted as the result of a chemical reaction.

1. The fact or phenomenon of light, radio waves, etc. being deflected in passing obliquely through the interface between one medium and another or through a medium of varying density.
3. Emitting light as a result of being heated.
4. The reflection of light-rays off smooth conducting surfaces, such as polished metal or metal-coated glass mirrors
5. Light emitted by a substance without combustion or perceptible heat.
6. The distance between successive crests of a wave, especially points in a sound wave or electromagnetic wave.
9. A specific type of gas-charged luminaire that produce light through a chemical reaction that involves gases and mercury vapor interacting to produce UV light.
15. Having an outline or surface curved like the exterior of a circle or sphere.