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Ch. 29 Vocabulay
Ch. 29 Vocabulary
Question | Answer |
---|---|
the bouncing back of a particle or wave that srikes the boundary between two media. | reflection |
a line perpendicular to a surface | normal |
angle between an incident ray and the normal to a surface | angle of incidence |
angle between a reflected ray and the normal to a surface | angle of reflection |
the angle of incidence for a wave that strikes the surface is equl to the angle of reflection. This is true for both partially ad totally reflected waves. | law of reflection |
the reflection of waves in many directions from a rough surface. | diffuse reflection |
an image formed though reflection or rarefraction that can be seen by an observer but cannot be projected on a screen because light from the object does not actually come to focus. | virtual image |
persistance of a sound, as in an echo, due to multiple reflections | reverbation |
the change in direction of a wave as it crossses the boundary between two media in which the wave travels at different speeds. | refraction |
the crest, trough, or any continuous portion of a 2D or 3D wave in which the vibrations are all the same way at the same time | wave front |
the floating image that appears in the distance and is due to the refraction of light in Earth's atmosphere | mirage |
the seperation of light into colors arranged according to their frequency, by the interaction with a prism or defration grading, for example | dispersion |
the minimum angle of incidence for which the light ray is totally reflected in the medium | critical angle |
the 100% reflection(with no transmition) of light that strikes a boundry between two media at an angle greater than the critical angle | total internal reflection |
a transparent fiber, usually of glass or plastic that can transmit light down it's length by means of total internal reflection | optical fiber |