| A | B |
|---|
| optics | the study of how light behaves |
| lens | a device that uses refraction to bend light to form an image |
| mirror | a device that uses reflection to bend light to form an image |
| prism | a device that bends different frequencies of light to seperate color |
| light ray | an imaginary arrow used to show that path of a single beam of light |
| refraction | bending of light rays that results as light crosses a boundary between two different substances |
| reflection | the bouncing of light rays from a surface |
| telescope | a device (used by Galileo) that uses a collectin of lenses to magnify an image |
| real image | an image formed by light rays coming together on a surface like th retina of the eye |
| virtual image | an image formed when light rays seem to come from a point other than where the object exists |
| normal | a line drawn perpendicular to the surface of a mirror or any surface |
| incident ray | the ray of light that strikes a mirror |
| reflected ray | the ray of light that bounces off a mirror |
| angle of incidence | the angle measured from the normal to the incident ray |
| angle of reflection | the angle measured between the normal and the reflected ray |
| retina | the back of the human eyeball where an image is formed |
| lens | this part of the human eye bends the light that comes into it |
| stereoscopic vision | the process by which humans use two eyes to see things with depth |
| total internal reflection | this process happens when the light inside a glass of water tries to get out but is reflected back into the material |
| fiber optics | a light pipe that uses total internal reflection to carry light and signals from one point to another |
