The photoelectric effect demonstrates that light consists of discrete energy packets (photons) because when sufficiently energetic photons strike a zinc surface, they knock electrons free and discharge an electroscope, but less energetic photons (like those from an incandescent torch) cannot accomplish this even with great intensity.
causalpending
Speaker
Unidentified Speaker — Quantum computing in the 21st Century – with David Jamieson [zxml8UQSwC0]Evidence Quote
“if you use photons that are individually sufficiently energetic to knock electrons out of the surface of the zinc you discharge the electroscope... individual packets of energy that cannot be further subdivided so in other words you can't have half a photon”
Created: 8/11/2026, 1:11:15 AM
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