Hoofd sponsors
Doet giften om de grootste sociale en milieu-problemen waar de samenleving mee te maken heeft aan te pakken en waar durfkapitaal, verstandig geïnvesteerd, uiteindelijk een verschil kan maken.
National Science Foundation
Een onafhankelijk federaal bureau dat in 1950 door het Congress in het leven is geroepen om de vooruitgang van de natuurwetenschap te bevorderen.
King Saud University streeft ernaar om een leider te worden op het gebied van educatieve en technologische innovatie, wetenschappelijke ontdekkingen en creativiteit door een sfeer van intellectuele inspiratie te bewerkstelligen ten behoeve van het welzijn van de samenleving.
De O'Donnell Foundation Streeft ernaar modelprogramma's te maken die de kwaliteit van het onderwijs verbeteren.
Boventonen
Learn how to make waves of all different shapes by adding up sines or cosines. Make waves in space and time and measure their wavelengths and periods. See how changing the amplitudes of different harmonics changes the waves. Compare different mathematical expressions for your waves.
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Zie hieronder
Onderwijsbronnen
Belangrijkste onderwerpen
- Golven
- Sinussen
- Cosinussen
Voorbeeld leerdoelen
- Explain qualitatively how sines and cosines add up to produce arbitrary periodic functions.
- Recognize that each Fourier component corresponds to a sinusoidal wave with a different wavelength or period.
- Mentally map simple functions between Fourier space and real space.
- Describe sounds in terms of sinusoidal waves.
- Describe the difference between waves in space and waves in time.
- Recognize that wavelength and period do not correspond to specific points on the graph but indicate the length/time between two consecutive troughs, peaks, or any other corresponding points.
- Become comfortable with various mathematical notations for writing Fourier transforms, and relate the mathematics to an intuitive picture of wave forms.
- Determine which aspect of a graph of a wave is described by each of the symbols lambda, T, k, omega, and n.
- Recognize that lambda & T and k & omega are analogous, but not the same.
- Translate an equation from summation notation to extended notation.
- Recognize that the width of a wave packet in position space is inversely related to the width of a wave packet in Fourier space.
- Explain how the Heisenberg Uncertainty principle results from the properties of waves.
- Recognize that the spacing between Fourier components is inversely related to the spacing between wave packets, and that a continuous distribution of fourier components leads to a single wave packet.
Tips voor docenten
De docentenhandleiding (pdf) bevat tips van het PhET team.
Onderwijsideeën
| Title | Authors | Level | Type | Updated |
|---|---|---|---|---|
Concept questions for Physics using PhET (Inquiry Based)
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Trish Loeblein | HS UG-Intro |
CQs | 1-8-11 |
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Wave unit (Inquiry Based)
|
Trish Loeblein | HS UG-Intro |
Lab Demo CQs |
7-8-11 |
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Fourier Making Waves Game (Inquiry Based)
|
Trish Loeblein | HS | Lab | 13-11-08 |
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Wave Representations (Inquiry Based)
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Trish Loeblein | HS UG-Intro |
Lab | 13-11-08 |
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Waves: Superposition (Inquiry Based)
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Trish Loeblein | UG-Intro HS |
Lab CQs |
13-11-08 |
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Wave clicker questions (Inquiry Based)
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Trish Loeblein | HS UG-Intro |
CQs | 7-8-11 |
| Making use of the Sound Simulations | Don Cameron | HS | Lab | 18-9-07 |
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Introduction to Fourier Analysis
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Sam McKagan, Kathy Perkins and Carl Wieman | UG-Adv UG-Intro |
HW | 20-4-10 |
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Wave Modeling and Wave addition (Inquiry Based)
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Trish Loeblein | UG-Intro HS |
Lab | 13-11-08 |
Je kunt je eigen ideeën en activiteiten indienen.
Vertaalde versies:
Eisen aan de software
| Windows | Macintosh | Linux |
|---|---|---|
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Microsoft Windows
XP/Vista/7 Sun Java 1.5.0_15 or later |
OS 10.5 or later
Sun Java 1.5.0_19 or later |
Sun Java 1.5.0_15 or later |
Credits
| Ontwerpteam | Bibliotheken van derden | Dank aan |
|---|---|---|
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