| A | B |
|---|
| Regular reflection | light reflecting from a smooth surface |
| Difffuse reflection | Rays reflecting in different directions from a rough surface |
| Law of reflection | Angle of incidence = Angle of reflection |
| Law of refraction | ni sin(theta)i = nr sin(theta)r |
| Index of refraction (n) | c/v property of a substance that is determined by how much the speed of light is reduced when passed through that substance |
| n air | 1.001 or 1 |
| n vaccuum | 1 |
| n water | 1.33 |
| Total internal reflection | When light passes from a more optically dense medium to less optically dense medium there is an angle so great thet there is no refracted ray only reflection back into the substance |
| Why can the sun be seen after sunset | Refraction of light over the horizon through the atmosphere. |
| What causes a mirage? | Refraction of light in air of different densities. |
| Dispersion of light | seperation of light into a spectrum by refraction |
| What causes a rainbow? | result of dispersion of the light in the raindrop. The light refracts at the front edge of the drop, reflects from the back of the drop and reflects back front edge of the drop again. |
| reflection | bouncing back of light at a boundary |
| refraction | light passes through but bends at a boundary |
| Light going from a large n to a small n is bent ________ normal | away from |
| light going from a small n to a large n is bent _________ | toward |
| Light waves of different wavelengths have slightly different refractive indices. | Thus they are refracted at different angles. |
