is light a wave or a particle? - The Photoelectric Effect - A Level Physics Revision

Описание к видео is light a wave or a particle? - The Photoelectric Effect - A Level Physics Revision

Quantum mechanics is pretty hard to get your head around, but once you see and understand the evidence for wave particle duality it starts to make sense.
Here I show you the classic gold leaf electroscope demonstration of the photo electric effect. Only light above a certain frequency will discharge the charged zinc plate.
We call this frequency the threshold frequency.

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