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23 Cards in this Set
- Front
- Back
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What is a wave? |
The transport of energy (not matter). |
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How do you find the frequency? |
f = n/t Frequency = number of cycles / time |
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What are the units of frequency? |
Hertz (Hz) |
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How do you find the period? |
T=1/f Time period = 1 / frequency |
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What is a mechanical wave? |
A sound wave. |
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What type of wave is mechanical? |
Longitudinal |
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What type of wave is longitudinal? |
A mechanical wave. |
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What is an electromagnetic wave? |
A wave that can move through a vacuum (ie. light); always transverse. |
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How are period and frequency connected? |
When period goes up, frequency goes down. |
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What are the main parts of both wave types? |
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How do you find intensity? |
I=P/S Intensity = Power / Surface area |
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How do you find power? |
Go super saiyan. Er, I mean... P=E/t Power = Energy / time |
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How do you find the speed of a wave? |
c=λf Speed = wavelength x frequency |
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What is audible sound? |
20 - 20,000 Hz |
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What is acoustic impedance? |
Density of material x speed of sound in that material |
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What are the types of reflection? |
Specular (smooth surface) Diffuse (rough surface) |
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What is normal incidence? |
When a wave impinges in medium at 90° angle. |
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What is refraction? |
When a wave goes through a medium. |
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What is the law of reflection? |
ai=ar Angle of incidence = angle of reflection |
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What is attenuation? |
Reduction in the intensity of a sound wave. |
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What is scattering? |
Redirection of a wave. |
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What is absorption? |
Change of wave energy. |
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What is a standing wave? |
When two traveling waves interfere Addition of wave amplitudes |
