Chapter 9 Introduction to Waves

A surface sends ripples across the lake water.  These ripples are an example of _____

• Rarefaction 

• Compression 

• Longitudinal Wave 

• Surface Wave

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For refraction to occur in a wave, the wave must_____

• Enter a new medium head on

• Enter a new medium at an angle 

• Change the direction within a medium 

• Strike an obstacle larger than the wavelength 

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The picture is an example of what?

• Diffraction 

• Constructive Interference 

• Destructive Interference 

• Reflection

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When the surfer rides an ocean wave on her surfboard, she is actually riding on_____

• crest that is toppling over

• rest position of the wave

• trough of the wave 

• region of rarefaction

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What does letter B stand for?

• Crest 

• Rarefaction 

• Trough 

• Compression 

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A period is the length of time it takes for ________

• a disturbance to start a wave

• two complete wavelengths

• a wave to travel the length of a rope 

• one complete wavelength to pass a fixed point 

Amplitude of a wave is dependent on which other characteristic of a wave?

• Frequency 

• Wavelength 

• Energy 

• Wave Speed 

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To find the amplitude, measure_____

• From a trough to the rest position 

• from the crest to the rest position 

• neither a or b 

• either a or b 

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How does reflection differ from refraction and diffraction?

• reflection is the only process that involves a change in the wave

• reflection affects all types of mechanical waves but refraction and diffraction doesn't

• Reflection is the only process in which the wave does not continue moving forward

• Reflection is the only process that changes the direction of the wave

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Pitch of a sound is directly related to what characteristic of a wave?

• Amplitude 

• Wavelength 

• Compression 

• Frequency