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Which of the settings—amplitude, frequency, damping, or tension—changes the amplitude of the wave as it propagates? What does it do to the amplitude? Frequency; it decreases the amplitude of the wave as it propagates.
Where the waves meet in phase, constructive interference occurs so antinodes are formed, which are regions of maximum amplitude. Where the waves meet completely out of phase, destructive interference occurs and nodes are formed, which are regions of no displacement.
The point where » = +A is typically called the \crest" of the wave and the point where » = ¡A is called the \trough" of the wave.2 The distance from crest to crest (or trough to trough) is called the \wavelength," the distance between points on the wave which have the same phase at the same instant of time.
THE PHYSICS OF WAVES HOWARD GEORGI Harvard University Originally published by PRENTICE HALL Englewood Cliffs, New Jersey 07632 °
Lecture 1: Mathematical Modeling and Physics (PDF) Lectures 2–3: Simple Harmonic Oscillator, Classical Pendulum, and General Oscillations (PDF) Lecture 4: Damped Oscillations (PDF) Lecture 5: Driven Oscillations (PDF) Lecture 6: Coupled Oscillations (PDF)
To find the amplitude: The y-axis of the CRO will show the displacement of the wave. The voltage/divisions setting will give the scale of the y axis. Each division will correspond to a stated voltage. Ensure the wave fills as much vertical space on the screen as possible by changing the voltage/div. .
• Wave energy is reflected by discontinuities in the impedance of a system • Reflection and transmission coefficients: – The wave is incident and reflected in medium 1 – The wave is transmitted into medium 2 ‰= Ša−Š‹ Š‹+Ša Œ= aŠa Š‹+Ša • Wave amplitudes: Q =˚“ 5 & =Ž 5
