| A | B |
|---|
| wavelength | The distance between a point one wave to the same point on the next wave. |
| frequency | Measures the number of complete waves that pass a point in one second (determines the HEIGHT OR LOWNESS of a sound) |
| laser Beam | (Light Amplification by Stimulated Emission of Radiation) A beam of intense color of only one wavelength and frequency |
| dispersion | The process of dividing white light into separate colors |
| medium | Any substance through which waves travel |
| luminous | Radiating or reflecting light |
| intensity | The level of brightness a luminous object gives off |
| light ray | the direction in which light waves travel |
| refraction | the change in direction of a wave as it moves into a medium where its speed is different |
| conductors | Substances through which current can flow, such as metals. |
| insulators | Substances which cannot conduct current, such as plastics. |
| voltage | The force needed to move an electrical current. |
| direct current | Current which flows in one direction only. |
| alternating current | Current whose direction in a circuit changes at regular intervals. |
| amphere | A unit of volume of electrical current. |
| watt | Unit of power used to measure the rate of energy conversion. |
| magnetic force | An invisible force of attraction or repulsion by a magnetic pole. |
| pole | The points in a magnet where the magnetic forces are concentrated. |
| magnetic field | The region around a magnet where objects are affected by the magnetic force. |
| first law of magnetism | Unlike poles attract and like poles repel. |
| amplitude | The height from a particle's rest position to a peak. |
