Physics 7C
DLM 04 Overview
DLM 04
Model: Single Waves
Act 8.1.8
Wave Wrap-Up: FNT 1 & 2ab(No Activity Sheet)
(~60 min)
Learning Goals:
•
Solidify understanding of the graphical representation of a wave
•
Solidify understanding of how to move from a graphical representation to an algebraic
representation
•
Solidify understanding of the wavefront representation of a wave
Model: Superposition of Waves
Act 8.2.1
Introduction to Superposition of Waves
(~30 min)
Learning Goals:
•
Getting the picture of superposition of waves being two waves at the same point at the same time
•
Understanding that the wave displacements add algebraically when waves interfere:
y
tot
(x,t) = y
1
(x,t) + y
2
(x,t)
•
Understanding the various terms and terminology used to express the result of superposition:
constructive interference, destructive interference, partial interference
Act
8.2.2
Interference with Sound Waves I
(~70 min)
Learning Goals:
•
To get acquainted with interference effects that occur when superposing sound waves of the same
frequency
•
Understand how the total phase difference
∆
Φ
(x,t) can depend on the fixed phase constant
difference
∆
Φ
alone
•
Understand how the total phase difference
∆
Φ
(x,t) can depend on the path length difference
∆
x
alone
•
Connecting the total phase difference
∆
Φ
(x,t) to constructive and destructive interference

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