Post on 21-Nov-2014
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Behavior of Waves
How Does Reflection Change a Wave?What Causes the Refraction of a Wave When It Enters a New Medium?What Factor Affects the Amount of Diffraction of a Wave?What Are Two Type of Interference? What Wavelengths Will Produce a Standing Wave?
Wave: Reflection• Reflection = when a wave bounces off a
surface that it cannot go through • Ex. Ball bouncing off a wall• Reflections do not:
–Change the speed or–Frequency of the wave but–The Wave can be flipped upside down
Wave: Refraction
• Refraction = the bending of a wave as it enters a new medium at an angle
• Refraction occurs because one side of the wave moves more slowly than the other side
Wave : Diffraction• Diffraction = is the bending of
a wave as it moves around an obstacle or passes through a narrow opening
• A wave diffracts more if its wavelength is large compared to the size of an opening or obstacle
• The larger the wavelength is compared to the size of the opening or obstacle the more the wave diffracts
Wave: Interference• Interference = When two or more waves
overlap or combine together• Constructive Interference =
Two or more waves combining to make a larger displacement
• Destructive Interference = Two or more waves that combine to make a smaller displacement
Standing Wave• Standing wave = a wave that appears to
not be moving.• Ex. if you Pluck a string on a Guitar.• Node = point of a standing wave with no
displacement.• Antinode = point where trough and crest
are halfway between nodes.
Node Antinode
Diffraction Node Antinode