| A | B |
|---|
| ·Light is a form of | radiation. |
| Incandescent | - kind of visible light that objects give off when heating up to a high temperature |
| Luminous | - giving off light; glowing by itself |
| Ultra violet | range of invisible wavelengths just shorter than visible light, that can cause a tan or burn |
| Infrared | invisible range of light we feel as heat, having wavelengths just longer than visible light |
| Transverse wave | - wave in which crests and troughs move up and down while the energy moves forward |
| crest | top of wave |
| trough | bottom |
| Amplitude | - the height of the wave from its mid-position to its crest or trough |
| wavelength | the distance between two similar points in the cycle of a wave |
| Speed of light | 300,000 km/s 100,000 miles/s |
| Opaque- | ca't see througu |
| translucent | can kind of see through |
| transparent | can see through |
| Our eyes have _____ lenses in them | convex |
| Convex lenses will produce a ______image | real |
| gamma radiation | is produced when the nucleus of an atom breaks up |
| x ray | produced by beams of electrons hitting a metal target |
| cosmic rays | from outer space- produced when the nuclei of atoms break up |
| ultraviolet | gives sunburns- used to kill germs- can casue skin cancer |
| gamma radiation | produced when the nucleus of an atom breaks up |
| x rays | are produced by beams of electrons hitting a metal target |
| microwaves | used in communication because they can travel through smoke fog and rain. used in microwav es to cook food. |
| Radar | waves are used to track satellites, speeding vehicles, and airplanes |
| AM waves | longer waves used in radios |
| FM waves | shorter waves and the same length waves as used in TV |
