Ch. 29 Vocabulary
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| the bouncing back of a particle or wave that srikes the boundary between two media. | reflection
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| a line perpendicular to a surface | normal
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| angle between an incident ray and the normal to a surface | angle of incidence
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| angle between a reflected ray and the normal to a surface | angle of reflection
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| 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
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| the reflection of waves in many directions from a rough surface. | diffuse reflection
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| 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
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| persistance of a sound, as in an echo, due to multiple reflections | reverbation
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| the change in direction of a wave as it crossses the boundary between two media in which the wave travels at different speeds. | refraction
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| 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
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| the floating image that appears in the distance and is due to the refraction of light in Earth's atmosphere | mirage
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| the seperation of light into colors arranged according to their frequency, by the interaction with a prism or defration grading, for example | dispersion
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| the minimum angle of incidence for which the light ray is totally reflected in the medium | critical angle
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| 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
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| a transparent fiber, usually of glass or plastic that can transmit light down it's length by means of total internal reflection | optical fiber
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
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