Physics Paradoxes
Fermi Paradox - Given the high probability of alien civilizations, why have we found no evidence of them? The univer...
Grandfather Paradox - If you travel back in time and prevent your grandparents from meeting, you'd never be born - so you ...
Olbers' Paradox - If the universe is infinite and eternal, why isn't the night sky blazingly bright? Every line of sig...
Black Hole Information Paradox - Information cannot be destroyed, but black holes seem to destroy everything. Where does the informat...
Archer's Paradox - An arrow must flex around the bow handle to hit a target it's not initially pointed at!...
Hydrostatic Paradox - Pressure at the bottom depends only on height, not container shape. A narrow tube exerts the same pr...
Faint Sun Paradox - The early Sun was 30% dimmer, yet Earth had liquid water. It should have been frozen!...
EPR Paradox - Measuring one entangled particle instantly affects another light-years away - "spooky action at a di...
Heat Death Paradox - If the universe were infinitely old, it would have reached maximum entropy. Why hasn't it?...
Banach-Tarski Paradox - A sphere can be decomposed into pieces and reassembled into TWO identical spheres! Mathematical dupl...
Two Capacitor Paradox - Connect a charged capacitor to an empty one. Energy is lost! Where does it go?...
Irresistible Force Paradox - What happens when an unstoppable force meets an immovable object?...
Moving Rows Paradox (Zeno) - Zeno's paradox about relative motion - time passes twice as fast from one perspective....
Grain of Millet - A single grain makes no sound, yet 10,000 grains make noise - how can many nothings become something...
Aristotle's Wheel Paradox - Two concentric circles travel different distances but complete rotation together....
Feynman Sprinkler - When a sprinkler sucks in water, which direction does it spin?...
D'Alembert's Paradox - Ideal fluids exert no force on objects - contradicting real experience....
Schrodinger's Cat - Cat in superposition of alive and dead until observed....
Quantum Zeno Effect - Continuously observing a quantum system prevents it from changing state....
Double-Slit Experiment - Particles behave as waves when unobserved, particles when observed....
Twin Paradox - Space traveler returns younger than their twin who stayed on Earth....
Maxwell's Demon - A hypothetical demon could violate the second law of thermodynamics....
Mpemba Effect - Hot water can freeze faster than cold water under certain conditions....
Loschmidt's Paradox - Time-reversible microscopic laws vs irreversible macroscopic entropy....
Gibbs Paradox - Entropy of mixing identical gases should be zero, yet calculation gives non-zero....