Ch.29 Powerpoint 2
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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| 1.What is reflected sound? | An echo.
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| 2.The bending of a wave as it crosses the boundary between two media at an angle is called? | Refraction
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| 3.When sound energy is not reflected it is __________ or ___________. | absorbed; transmitted.
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| 4.What occurs in uneven winds or uneven temperature? | Sound Refraction
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| 5.The broken pencil is an example of what? | Refration of Light
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| 6.When light slows down, it bends ________ the normal. | Toward
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| 7.What is a mirage? | A distorted image caused by refraction of light in Earth's atosphere.
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| 8. The separation of light into a range of colors according to their frequencies is __________. | Dispersion
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| 9. What are the conditions to see a rainbow? | The sun must be shining in part of the sky, water droplets must be in the opposite part of the sky, and the sun must be behind you.
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| 10. ___________ occurs when the angle of incidence is larger than the critical angle. | Total internal reflection.
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| 11. The critical angle for glass is about ___. | 43 degrees.
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| 12. What are light pipes are another name for? | Optical fibers.
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| 13. ___________ are used by mechanics, machinists, and physicians. | Optical fibers.
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| 14. What is the study of the relective properties of surfaces? | Acoustics
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| 15. Light waves are faster in ________ and slower in _________. | Air; water.
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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:
cboxdorfer
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