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Ch.29 Powerpoint 2

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