| A | B |
|---|
| Electromagnetic Waves | a transverse wave consisting of changing electric and changing magnetic feild |
| Electric Feild | a feild in a region that space exerts electric forces on charged particlesl; a field produced by electric charges or by changing magnetic feild |
| Magnetic Feild | a feild in region of space that exerts on a magnet, on magnetic forces; a feild produced by magnets, by changing electric feilds, or by moving charges |
| Photoelectric Effect | the emission of electrons from a metal caused by light striking the metal |
| Photon | a packet of electromagnetic energy |
| Intensity | the rate at which a wave's energy flows through a given unit of area |
| electromagnetic radiation | the transfer of energy by electromagnetic waves |
| amplitude modulation (am) | a method of transmitting a radio signal in which the amplitude of the carrier wave varies while its frequency remais the same |
| frequency modulation (fm) | a method of transmitting a radio signal in which the frequency of the carrier wave varies while its amplitude remains the same |
| thermogram | a color-coded picture using variation in infared radiation to show variations in temperature |
| electromagnetic spectrum | the full range of electromagnetic radiation |
| translucent | a description of material that scatters light passes through it |
| opaque | a description of material that either absorbs or reflectws all of the light that strikes it so nothing can be seen through it |
| image | a copy of an object formed by reflected rays of light |
| regular reflection | a reflection that occurs when parallel light waves |
| diffuse reflection | reflection that occurs when parallel light waves strike a rough, uneven surface and reflect in many different direction |
| mirage | a false or distored image |
| polarized light | a type of light including light with waves that vibrate in only one plane |
| scattering | a process by which light is redirected as it passes through a medium |
| transparent | a description of a material that allows most the light that strikes it to pass through |
| primary colors | three specific colors that can be combined in varying intensities |
| secondary colors | new color that results when any two of the primary colors are combined |
| complementary colors light | any two colors of light that combine to form white light |
| pigment | a material that selectively absorbs certain colors of light and reflects other colors |
| complementary colors of pigment | ant two colors of pigment that combine to make black pigment |
| luminous | a description of an object that gives off its own light |
| Incandescent | a description of an object hot enough to glow |
| flourescence | a process in which phosphorescent material coverts radiation into visible light |
| phosphor | a solid material that emits light by fluorescence |
| laser | a device generates a beam if coherent light |
| coherent light | light waves having the same wavelength, with the crest and troughs lined up |
