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How to Invent a Law of Physics

5 sessions, in order

Four rules any law of physics has to obey, one per session, then a capstone where you invent one and test it against all four.

1.P&A-56The Sun Could Already Be GonePhysics & Astronomy~30 minIf the Sun vanished right now, when would we find out? Locality, the rule that nothing reaches across empty space without crossing it first.
2.P&A-57The Race You Can Never WinPhysics & Astronomy~30 minWhat happens if you chase a beam of light? The rule that no experiment can tell whether you are moving steadily, and the price the universe pays to keep it true.
3.P&A-58Why Can Birds Safely Stand on Electrical Wires?Physics & Astronomy~28 minHow does a bird sit on a wire carrying thousands of volts and walk away? Only differences between two points are real, and physics is built to not care where you put zero.
4.P&A-59The Lifeguard Who Runs the Wrong WayPhysics & Astronomy~32 minWhy does a straw look bent in a glass of water? Light takes the quickest route rather than the straightest one, and every law of physics can be written the same way.
5.P&A-60Face the CommitteePhysics & Astronomy~15 minCould you invent a new law of physics? Four tests that kill almost every law you can imagine, and what is left standing when you apply all four at once.