Light – Wave, Particle, or Both?
Light is the most familiar thing in the world and one of the strangest. For two centuries physicists argued about whether it was a wave or a stream of particles, ran clever experiments to settle it, and ended up with an answer nobody expected: it's both, and neither, depending on how you look. We trace that argument and what it revealed about the deep grain of reality.
You'll come away understanding why the famous double-slit experiment is so unsettling, what a photon actually is, how the colours you see are just a thin slice of a vast spectrum, and why “wave-particle duality” is less a…
The skinny
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