Why the Most Distant Galaxies Look Bigger (watch on YouTube, opens in a new tab)
An animated explanation of why the most distant galaxies can appear larger, tracing light through the expanding universe.
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Videos
Animated physics lessons.
Earlier lessons
The quantum harmonic oscillator (watch on YouTube, opens in a new tab)
An animated derivation, from power series and ladder operators to coherent states.
Watch on YouTube (opens in a new tab)Separation of variables (watch on YouTube, opens in a new tab)
Separating the spatial and temporal parts of Schrödinger’s equation.
Watch on YouTube (opens in a new tab)The infinite square well (watch on YouTube, opens in a new tab)
Solving Schrödinger’s equation for a particle confined between two walls.
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