Help Finding Source of Feynman Quote

[JPBenowitz]

Homework Statement

I don't really know where to post this but I chose this section. I need help finding the source of this Feynman Quote "The probability of detecting a photon at any point is the sum of all the probabilities of the photon being detected at that point by any path"

Homework Equations

The Attempt at a Solution

 

[fzero]

It might be from his popular lectures on QED:

http://en.wikipedia.org/wiki/QED:_The_Strange_Theory_of_Light_and_Matter

If that exact quote isn't there, the concept itself is explained at a very basic level.

 

[phinds]

]... I need help finding the source of this Feynman Quote "The probability of detecting a photon at any point is the sum of all the probabilities of the photon being detected at that point by any path"

Since this is one of his fundamental principles, he said it many times and very likely wrote it many times as well.

 

[TSny]

If that's a direct quote, then he must have been speaking loosely. It's the probability amplitudes for all the paths that are added to get the total probability amplitude. You then "square" the total amplitude to get the total probability. The distinction between adding amplitudes and adding probabilities is fundamental to quantum mechanics.

 

[paranormal]

I can understand the frustration of not being able to find the source of a quote. However, it is important to always verify the accuracy and authenticity of any information, especially when it comes to scientific quotes. In this case, I suggest starting by checking the original works of Richard Feynman, such as his lectures, papers, and books. You can also search for the quote in reliable databases and sources, such as academic journals and reputable websites. It may also be helpful to reach out to other scientists or experts in the field to see if they are familiar with the quote and its source. Remember to always cite your sources accurately in any scientific work to ensure credibility and avoid plagiarism.