Quantum mechanical theory is that a photon has no mass (correct?), however, wasn't it Slater or Bohm who posed that a photon has mass and can be treated much like an electron?

Are photons absorbed or reflected? If that is the case, they would surely not go on forever...

I thought there were different theories on it (and none proven) for example that either light will travel until it is absorbed or it will travel until it dies or stops eventually.

More to the point, is this a project or research of yours or just a hobby?



>>Dude, I want your drugs.
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>My thought:
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>The Universe is infinite in size and age.
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>Light has a limited range, so we observe a finite number of stars and galaxies in a finitely sized space.
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>Your thought:
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>The Universe started 14 billion years ago in this cosmic egg, a little point, and then it started to grow and grow.
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>Light leaving our galaxy will travel forever, unless the Universe starts contracting into a Big Crunch or something like that.
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>Now, come on. Really.
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>Which one sounds rational and which sounds like a hallucination?