D3 sensor efficiency

Started Nov 18, 2007 | Discussions thread
OP ejmartin Veteran Member • Posts: 6,274
A little science history...

Jay Williams wrote:

I'm not a scientist, so I don't know, but don't photosites collect
photons, not electrons?

When a photon strikes the surface of a material, if its energy exceeds a certain threshold (dependent on the material) it will kick out an electron. This is called the photoelectric effect, and was one of the first bits of evidence for the quantum nature of light. Einstein won the 1921 Nobel Prize in Physics for his explanation of this effect (not, as many people assume, for the theory of relativity).

Bottom line is that each electron accumulating in the photosite traces back to a photon in the light signal being detected.

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