Questions and Answers
What happens to the pulse when it reaches the fixed end?
It bounces back but under the ruler. Transverse (no compressions or retractions).
Which slider will adjust the starting height of the wave?
What is the maximum height possible?
1.25 cm
Which slider makes the height of the wave decrease as it travels?
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What is Wavelength 1 when the amplitude is at 0.5 cm and frequency at 1.00?
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How does wavelength #1 compare to wavelength #2?
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What are the methods to measure wavelength?
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What happened to the wavelength when frequency increased from 1.50 Hz to 2.00 Hz?
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What happened to the wavelength of the wave when the frequency has doubled?
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What happened to the wavelength of a wave if the frequency has tripled?
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Why did the summary chart not include any information about the amplitude?
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Define frequency in terms of wave measurement.
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What is oscillation?
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Explain the concept of damping.
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Study Notes
Pulse Behavior
- A pulse reaching a fixed end bounces back but remains under the reference point, demonstrating transverse motion without compressions or retractions.
Wave Parameters
- The amplitude of a wave refers to its maximum height; the maximum amplitude recorded is 1.25 cm.
Damping Waves
- Damping leads to a decrease in wave height over time, producing an exponentially decaying sinusoidal wave.
Wavelength Measurements
- Wavelength measurements include:
- Wavelength 1: 6.2 cm at 1.00 Hz frequency, with amplitude varying.
- Wavelength 2: Also 6.2 cm, regardless of amplitude changes (from 0.5 cm to 1.00 cm).
Measuring Wavelength
- Wavelength can be measured from crest to consecutive crest or trough to consecutive trough.
Wavelength Comparisons
- Wavelength #1 is identical to wavelength #2; amplitude changes do not affect wavelength.
Effects of Frequency
- Increasing frequency from 1.5 Hz to 2.0 Hz results in a wavelength decrease from 4.2 cm to 3.2 cm.
- Wavelength #5 measures 2.2 cm at a frequency of 3.00 Hz with constant amplitude.
Importance of Frequency in Wavelength
- The summary chart excludes amplitude since it does not impact wavelength, while frequency strongly influences it.
Frequency-Wavelength Relation
- Higher frequencies correlate with shorter wavelengths:
- At 1.00 Hz, wavelength is 6.2 cm; at 3.00 Hz, it drops to 2.2 cm.
Proportional Relationship
- Wavelength inversely correlates with frequency: Doubling frequency reduces wavelength proportionally.
Tripling Frequency Effect
- Tripling frequency results in a decrease in wavelength; for example, from 1.00 Hz (6.2 cm) to 3.00 Hz (2.2 cm).
Simulation Activities Overview
- Activities included exploring simulation parts, varying amplitude while measuring wavelength, and comparing data across different frequency settings.
Frequency Definition
- Frequency is defined as the number of wavelengths that pass a point in one second.
Wave Types
- Transverse waves exhibit oscillatory behavior characterized by their displacement perpendicular to the direction of wave propagation.
Oscillation Characteristics
- Oscillation involves repetitive movement around a central value or between different states, exemplified by swinging pendulums or alternating currents.
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Description
Test your knowledge on wave behavior with these flashcards from the PhET simulation of waves on a string. Learn about pulse reactions at fixed ends, amplitude adjustments, and wave damping. Perfect for students studying wave physics.
