17.3 and 17.4
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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| reflection | occurs when a wave bounces off a surface that it cannot pass through
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| refraction | the bending of a wave as it enters a new medium at an angle
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| diffraction | the bending of a wave as it moves around an obstacle or passes through a narrow opening
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| interference | occurs when two or more waves overlap and combine together
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| constructive interference | occurs when two or more waves combine to produce a wave with a larger displacement
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| destructive interference | occurs when two or more waves combine to produce a wave with a smaller displacements
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| standing wave | a wave that appears to stay in one place-it does not seem to move through the medium
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| node | a point on a standing wave that has no displacement from the rest position
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| antinode | a point where a crest or trough occurs midway between two nodes
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| sound waves | longitudinal waves-compressions and rarefactions that travel through a medium
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| intensity | the rate at which a wave's energy flows through a given area
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| decibel | unit that compares the intensity of different sounds
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| loudness | a physical response to the intensity of sound, modified by physical factors
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| pitch | the frequency of a sound as you perceive it
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| sonar | a technique for determining the distance to an object under water
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| doppler effect | a change in sound frequency caused by motion of the sound source, motion of the listener, or both
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| resonance | response of a standing wave to another wave of the same frequency
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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.
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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:
mgorcz
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