| A | B |
| Opaque | material that allows no light to pass through |
| Transparent | material that allows light to pass through easily |
| Translucent | material that allows some light to pass through; usually makes it dull |
| Light Ray | a beam of light energy that travels in straight line in one direction |
| Roy G Biv | Red, Orange, Yellow, Green, Blue, Indigo, Violet; colors of the visible spectrum |
| Prism | glass that bends light into the different wavelengths |
| Reflection | the bouncing off of light rays from a surface |
| Refraction | the bending of light rays when going through different mediums |
| Longest Wavelength | red has the longest wavelength |
| Shortest Wavelength | violet has the shortest wavelength |
| Concave | a lens that is bent in and scatters light |
| Convex | lense that is bent out and it focuses light |
| Spectrum | The colors which can be seen when light passes through a prism |
| Wavelength | distance between two waves |
| Transmission | light being passed through an object when it reaches it. |