Talk:QED: The Strange Theory of Light and Matter

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Cancelling out of light.

Feynman says that light can enter and pass through a presumably opaque sided passageway, and then out through 2 holes at the end, which is consistent with light being a form of massless energy in translation. Then he says that if the holes are a certain distance apart, the light rays will cancel each other out. That's where I get lost. I can see energy redistribution and interference, but cancelling out of light energy? Which one would be + and which -? Anybody got ideas?WFPM (talk) 18:25, 3 March 2011 (UTC)[reply]

The discussion page is a page to discuss the WP article, not a page to discuss the book. You might want to ask your question on physicsforums.com. --75.83.69.196 (talk) 03:45, 9 June 2011 (UTC)[reply]

Late to the query, but instead of snarking, it is not an issue of charge (+/-), it is merely the holes being the *right* distance apart relative to their energy (frequency) so as to allow for destructive interference-- canceling out of emitted light waves. WurmWoode^T 18:04, 9 December 2020 (UTC)[reply]