The garden
Living documents we keep tending, revising, and growing.
20 documents
It swallows light and gives nothing back — so how can it have a temperature, and slowly boil away to nothing? The story of Hawking radiation, and the paradox that discovery left unsolved.
Pump out the air, the light, the heat. What's left is the vacuum — the most crowded, most restless nothing you'll ever fail to see, and home to the worst prediction in physics.
Glass is a dense solid, yet light crosses it untouched. Not because light finds the gaps — because visible light has no allowed energy rung to spend itself on, and so is never absorbed at all.
A laser isn't just a brighter, tidier flashlight. It's light doing something ordinary light never does — moving in perfect lockstep — and Einstein predicted the trick forty years before anyone built one.
Plants move captured sunlight to the reaction center with near-perfect efficiency — possibly by letting the energy explore every path at once, quantum-style. A notebook on a contested, beautiful idea.
The idea is seductive: consciousness is mysterious, quantum mechanics is mysterious, so maybe one explains the other. Here's why physicists mostly say no — and what quantum biology really shows.
The blocks, the gap in the middle, the two rows exiled to the bottom — none of it is arbitrary. The table's shape is a portrait of how electrons stack inside atoms.
Cool certain materials enough and electrical resistance doesn't just shrink — it hits exactly zero, and magnets float. A quantum effect you can watch with your eyes.
Atoms are almost entirely empty space, so what actually holds you up? Not what you'd guess — and it's the same quantum rule that keeps a dead star from collapsing.
Absolute zero is where motion would stop — and the third law of thermodynamics says you can approach it forever without reaching it. The strange physics of the very, very cold.
Three states of matter is what school teaches. There are more — and the single most common state in the universe is one you were probably never told about.
Heisenberg's principle isn't that measuring disturbs things. It's that 'a definite position' and 'a definite momentum' can't both exist at once — a fact baked into anything wavelike.
A particle without enough energy to climb a barrier sometimes appears on the other side anyway. Improbable, relentless, and quietly responsible for sunlight and flash memory.
Fire electrons one by one at two slits and an interference pattern still appears — as if each electron passes through both. The experiment Feynman called the heart of quantum mechanics.
Light behaves like a wave until you ask it to behave like a particle, and matter returns the favor. Duality isn't a paradox so much as a warning that our two words are too small.
Not relativity — a humble experiment about light knocking electrons out of metal. It forced physics to accept that light comes in particles, and it explains the solar panel on your roof.
The famous cat wasn't a celebration of quantum weirdness — it was a physicist's sarcastic attempt to show the theory couldn't be taken literally. What the thought experiment was really arguing.
A quantum system can be in two states at once — but 'at once' doesn't mean what the headlines imply. What superposition is, and what it definitely isn't.
Two particles share a fate across any distance — and yet you cannot use it to send a single bit faster than light. Why both halves of that sentence are true.
Every electron carries a fixed dose of angular momentum called spin — yet it isn't turning, and it never was. Where the name came from, and why the thing it names runs the periodic table.