| A | B |
|---|
| induced charge | a charge that forms on an area of a neutral object when a charged object is placed near it |
| secondary color | a color that is produced when two primary colors blend together |
| generator | a device that converts mechanical energy--supplied by a hand crank, turbine, or motor--into electricity |
| electromagnet | a device that is magnetized by current electricity |
| electricity | a flow of electrons, particles having a negative electric charges |
| resistor | a material through which electricity has difficulty flowing |
| frequency | a measure of how many wave crests or troughs pass a given point in one unit of time |
| visible light | a mixture of wave lengths that the human eye can detect |
| lens | a piece of transparent material with at least one curved surfacce |
| concave | a surface that curves inward |
| convex | a surface that curves outward |
| prism | a triangular piece of glass or plastic that bends light |
| compressional wave | a wave that moves matter back and forth as it travels through a medium |
| transverse wave | a wave that moves matter up and down as it travels through a medium\ |
| transparent | allowing light to pass through with almost no distortion |
| compression | an area where particles in a medium are pushed together by a wave's energy |
| rarefaction | an area where particles in a medium are spread apart by a wave's energy |
| magnetic field | an invisible area where the forces of magnetic attraction or repulsion can be detected |
| mirror | an object with a polished or smooth surface that forms images by reflection |
| diffraction grating | glass or polished metal with many thin, parallel slits that refract light when it passes through |
| reflection | how a wave bounces off an object and changes its direction of travel |
