Photons Missing In Action

Started Nov 24, 2009 | Discussions thread
Robert Tolputt Regular Member • Posts: 317
Re: Photons Missing In Action

This is an interesting discussion. Lenses are just devices which select out those photons which will produce the required image. Being quantum entities, photons will take all possible paths - only some of these are usefully image forming. Lens manufacturers prefer the theoretical f-stop measure of their products' efficiency of course.

As to what happens to the "missing in action" photons - its true that most will captured by the lens itself by absorption. For those interested in the natural history of photons - have a read of Richard Feynmann's "QED" and prepare to be amazed !

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