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Kohl 29 Terms
vocabulary
| Question | Answer |
|---|---|
| reflection | bouncing back of a particle or wave that strikes a boundary between two media |
| normal | a line perpendicular to a surface |
| angle of incidence | angle between the incident ray and the normal |
| angle of reflection | angle between the reflected ray and the normal |
| law of reflection | The angle of incidence equals the angle of reflection. |
| virtual image | an upright image formed by reflection or refraction that cannot be projected onto a screen |
| diffuse reflection | the reflection of waves in many directions from a rough surface |
| reverberation | persistance of sound, as in an echo, due to multiple refections |
| refraction | the change in direction of a wave as it crosses the boundary between two media in which the wave travels at different speeds |
| wave front | lines drawn to represent crests of waves, drawn perpendicular to the direction the wave is traveling |
| mirage | a floating image that appears in the distance and is due to the refraction of light in Earth's atmosphere |
| dispersion | the separation of light into colors arranged according to their frequency |
| critical angle | the minimal angle of incidence for which a light ray is totally reflected within a medium |
| total internal reflection | the 100% relection of light stat strikes the boundary between two media at an angle greater than the critical angle |
| optical fibers | a transparent fiber, usually of glass or plastic, that can transmit light down its length by means of total internal reflection |
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mkohl
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