Understanding wave-particle duality

One of the most confusing concepts in physics, wave-particle duality is unlike anything we see in the ordinary world.

Light is a wave. This fact is something that most people are familiar with and it’s been known since the experiments carried out by the English polymath Thomas Young in the early 1800s:

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Thomas Young’s sketch of two-slit diffraction of waves, 1803
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Engraving of James Clerk Maxwell
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A wave and a particle!

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