Is it possible that the universe consists of only one beam of light (details inside)?

I don’t think so. There are many sources for light. We know that. Black holes swallow light, so that is probably why everything isn’t covered in light.

@Patty_Melt Perhaps Black holes prevent light from going everywhere at once and serve a purpose. Limiting light from overtaking everything.

I don’t think that time stops for anything that travels of the speed of light. I also think that in modern physics only light travels at the speed of light. I also don’t think that time stops for light in any case, and certainly not for a frame of reference such as we experience. In our frame of reference, light travels at the speed of light, which is not infinite speed but a certain measurable speed. I also don’t think that all of the universe is one one beam’s path, so even if all the light in the universe were one thing, it wouldn’t be all on one beam path. Also light gets absorbed by non-reflective objects, and it emits as a product of many/most reactions and interactions, so I think the “one beam of light” is incorrect for those reasons as well as others.

However despite all those objections to your specific thinking and wording, I think there may be some interesting things going on that bear some resemblance to the shape of what you’re thinking. It reminds me of the holographic universe concept, which I think is also interesting and on to something.

LSD is weird that way…

Every star produces beams of light why do you think there may be just one? In our frame of reference time exists but in the frame of reference of light beams it may not but that is not something we can experience.

My understanding of relativity is that from a photon’s perspective time does not change, but from any other perspective the distance a photon travels takes time.

I am not following your logic leading to infinite speed. If everything stops for light then to a lightbeam the universe is frozen in place.

I think you might like this theory that there is only one electron in the Universe.

There’s the problem of defining “beam” when talking about light. The photon as well is difficult to pin down as a concept.

[Spider:] Everything in the universe is . . . is . . . is made of one element, which is a note, a single note. Atoms are really vibrations, you know, which are extensions of THE BIG NOTE, everything’s one note. Everything, even the ponies. The note, however, is the ultimate power, but see, the pigs don’t know that, the ponies don’t know that.
[Monica:] You mean just we know that?
[Spider:] Right!

From Lumpy Gravy, by Frank Zappa