Turn Based Q&A: light having no rest mass

Initial comment/question: My understanding is that light always moves at the speed of light and never has mass.

That's kind of my point, for the math to work, special relativity indicates that if one could have the perspective of seeing light at rest, then its mass would be zero, as I understand it. This means that 100% of light's apparent mass/energy comes from its momentum. Basically having zero rest mass collapses the mass formula for light into an undefined state of 0/0. Even in the now more commonly known e=mc^2 equation this is an issue, but the issue is generally just sidestepped by saying light always moves at the speed of light. This still doesn't remove the exception though, it just labels light a "special" case not bound by the rest of the rules of the system because the math fits observation. However, light's behavior, specifically its interaction with matter, is at the core of all the math derived in the theory, meaning its behavior ultimately needs to mathematically fit the final theory for the theory itself to be complete. From what I can tell this is an unresolved and generally unacknowledged issue with special relativity, like a blind spot, making the special theory of relativity incomplete, logically if not mathematically. This may be why it has such difficulty reconciling with effects on very small scales, as it is very close to The Theory of Everything, but not quite there on smaller scales. I'm not saying my theory is currently complete by any means, but my hope is that the framework I have provided can allow for one more learned than myself to make it so.

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