Waves become Matter?

  • Thread starter baywax
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baywax said:
Does an em wave have a weight?
Weight is something we measure, and is explained by a (condensed) bit of matter under the influence of a gravitational field. I think it's ok to say that weight (a property) "emerges", because of this (simple) fact.

Photons are massless, but are energy and have momentum (their rest mass is zero, but since they are never at rest, this is a "short cut" we make to determine something about the nature of photons). Photons have a mass/energy equivalent, which means that information (the photons that we "see") has mass/energy also...
 

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