| A | B |
|---|
| Straight lines | The direction light travels from a source. |
| Transverse waves | The way light travels. |
| Crests | High points of a light wave. |
| Troughs | Low points of a light wave. |
| Amplitude | Distance from the mid or resting pint tothe crest or trough. |
| Wavelength | Distance between idential pars of the wave. |
| Luminous | Produces its own light. |
| Bioluminescent | Insects or fungi that produce their own light. |
| Incandescent | Must be heated to give off light. |
| Reflection | Bouncing of light from a shiny surface back to our eyes. |
| Law of Reflection | Light strking a mirror and refleting at the same angle. |
| Refraction | Bending of light when it travels from one medium to another. |
| Transparent | Objects that transmit light easily. |
| Translucent | Objects that transmit light, but image is not clear. |
| Opaque | Materials that do not let light pass through. |
| Lens | Transparent object that bends light rays as they pass through it. |
| Convex lens | Lens where the sides bulge utward. |
| Focal point | Place which light focueses after passing through a convex lens. |
| Concave lens | Lens that caves inward |
| Visible light | Light you can see |
| Electromagnectic spectrum | Colors of the rainbow |
| Red wavelength | Longest wavelength |
| Violet wavelength | Shortest wavelength |
