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Long Island, NY • Mr. Mangiacapre
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Short and deep-dive episodes on the physics behind everyday life and the people who discovered it. Press play to stream right away — nothing to download.
Why are the last two centuries called the age of physics? Follow five questions that seemed useless when they were asked — Faraday’s magnet and coil, Röntgen’s glowing screen, Thomson’s electron, Einstein’s fast-running clocks, and stimulated emission — as they turn into electric power, X-rays, the transistor, GPS, and the laser. A companion to the reading passage of the same name.
Physics × Medicine
A high school physics teacher and an experienced physician explore how X-rays, C.T., M.R.I., P.E.T., ultrasound, particle accelerators, and more transformed diagnosis and treatment—and what focused ultrasound, FLASH radiotherapy, and theranostics may bring next.
Narrated with synthesized voices. Episode includes educational discussion, not personal medical advice.
A deep dive into how trapping light inside a thin strand of glass changed surgery. Thanks to total internal reflection, light can bounce down a bent fiber without escaping — letting doctors see inside the body through a tiny opening and perform procedures that once required a large incision.
Why does a diamond blaze with light while glass just shines? Diamond’s very high index of refraction (about 2.42) gives it a small critical angle (about 24°), so light entering the top is trapped by total internal reflection and bounced back out toward your eye.
GPS satellites turn tiny time delays into distances, so their atomic clocks have to be nearly perfect. Speed makes them run about 7 μs/day slow (special relativity), weaker gravity makes them run 45 μs/day fast (general relativity) — ignore the 38 μs net and your map drifts over 10 km a day. Includes the story of the 1977 “Einstein switch” on the NTS-2 satellite.
An AI-voiced deep dive into the law of inertia. When the net force is zero, an object at rest stays at rest and an object in motion keeps its speed and direction. Only an unbalanced force changes motion — so why do moving things seem to stop on their own?
Why is it hard to start pedaling a bike from rest but easy to keep going? An AI-voiced discussion of inertia as resistance to a change in motion — and why more mass means more inertia, from ping-pong balls and golf balls to linemen and receivers.
When a truck hits a small car, which one feels the bigger force? Neither! This episode tackles the most common third-law misconceptions — why action–reaction pairs act on different objects and don’t cancel, and why equal forces can still produce very unequal results.
Adding sound should make things louder — so how do noise-canceling headphones make noise disappear? A quick look at superposition and destructive interference: tiny microphones sample the noise and the headphones play its exact inverse, so compressions meet expansions and cancel.
“It’s just a theory” gets science backwards. A law describes what nature does (often as an equation), while a theory explains why it happens. They’re different tools, not steps on a ladder — so no amount of evidence turns a theory into a law.
A deep dive into one of science’s bitterest rivalries. Hooke — of Hooke’s Law — clashed with Newton over light and over credit for the inverse-square law of gravity. After Hooke died, Newton led the Royal Society, and today not a single confirmed portrait of Hooke survives.
Marie Curie’s lab notebooks are still radioactive more than a century later. This deep dive follows her from a leaky Paris shed to the discovery of polonium and radium, and explains her big idea: radioactivity comes from inside the atom itself — along with the price she paid for it.
Machines took over the backbreaking physical labor that once wore out human bodies. But did we just trade one kind of strain for another? A deep-dive conversation on what technology gives us, what it takes, and what it means for how we work and think.
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