Category Archives: Unit 4

Fermilab video – Why does light slow down in water?

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Fermilab video – Why does light bend when it enters glass?

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PhET – Wave Interference

Make waves with a dripping faucet, audio speaker, or laser! Add a second source to create an interference pattern. Put up a barrier to explore single-slit diffraction and double-slit interference.

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Heisenberg’s Uncertainty Principle – the single slit video

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Veritasium – The world in UV

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Professor Dave Explains: Bohr Model of the Hydrogen Atom

Why don’t protons and electrons just slam into each other and explode? Why do different elements emit light of different colors? Niels Bohr knew why. And now you will too!

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Professor Dave Explains: Wave-Particle Duality and the Photoelectric Effect

Look, up in the sky, it’s a particle! It’s a wave! Actually it’s both. It’s light! How do we know about this stuff? Well, because of Einstein for one. He did more than E = mc^2, you know. But don’t … Continue reading

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Exam formula sheet

Here is a copy of the exam¬†formula sheet with rearrangements of equations. It’s a very long list; it would be useful to¬†make sure that you have the rearrangements (particularly kinematics and gravity) on your own summary sheet.

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Diffraction & interference podcast

Diffraction, Diffraction through gaps, Interference patterns – two sources, Calculating interference patterns, Calculating interference patterns – directly between sources Calculating interference patterns – in front of one source. Download the notes. Download the videos. Links: pHET Wave interference Interference of … Continue reading

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Making music podcast

Standing waves in strings, Speed of waves in strings, Standing waves in strings – other harmonics, Beats, Open ended pipes, Open ended pipe harmonics, Closed pipes, Closed pipes harmonics, Harmonics & timbre, Spectral analysis Download the notes. Download the video.

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