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Quantum Tunneling: How Particles Pass Through Walls They Can’t Climb

Quantum mechanics says particles can appear on the far side of barriers their energy should not let them cross. The phenomenon is not exotic: it is why the sun shines, how alpha decay happens, and why scanning tunneling microscopes can image atoms.

May 1, 2026


Quantum Tunneling: How Particles Pass Through Walls They Can’t Climb
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