Date post: | 21-Dec-2015 |
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1
Physics 7C SS1Lecture 2: Wave Model
1D & 2D Wave Review
Phase Constant vs. Total Phase
Introduction to Interference
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Longitudinal vs. Transverse Wave Polarization
Longitudinal Wave Transverse Wave
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Wavefront Representation
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Wavefront RepresentationHow long is the marked
distance?a) /2b) c) T/2d) T
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Source vs. Medium Consider:
Period Wavelength Frequency Wave speed
Which can be changed if the source changes in some way?
Which can be changed if the medium changes in some way?
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Source vs. Medium
When I change the speed at which the machine moves, which of the following will change?
a) Frequency, period, wavelength, and wave speed all change
b) Frequency, period and wavelength
c) Frequency and wavelength
d) Wavelength and wave speed
e) Frequency and period
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Waves review Wave displacement
depends on where AND when (x and t)!
What are we graphing anyway?
Check out “longitudinal traveling wave” application; Link on web page!
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Total Phase
Which of the following includes only points with a total phase of exactly /2?
a) All
b) ABC
c) ADG
d) AEH
e) ACF
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Total Phase
Which of the following includes only points with a total phase equivalent to /2?
a) All
b) ABC
c) ADG
d) AEH
e) ACF
10
Fixed Phase Constant
Which of the following lists only points with a fixed phase constant of exactly to /2?
a) All
b) ABC
c) ADG
d) AEH
e) ACF
11
Mathematical relationships & Model Tools: Making sense of the wave equation:
Using Total Phase Charts:
2π 2π Unit circle
Wave 1
€
t
T
€
x
λ
€
=Asin(Φ)
€
y(x,t) = Asin(2πt
T± 2π
x
λ+ φ)
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Practice Quiz