If there is an end to the Universe, where does light go when it reaches it?

It continues to define the edge of the universe, pushing out the boundries of the universe as it travels away from its source.

Minnesota:

Really? I had always heard that it circled back around and eventually approached its source from the rear.

Who is proposing the statement you made (which makes a lot of sense to me)?

Thanx.

Anguilla

This may be of help. it is from an excellent discussion on the properties of space.


"4.2 Space as Quantifiable
The concept of the consumption or reduction of a volume of space by a mass cannot be rationalized if space is still seen as equal to nothingness or seen as static. As discussed in Part 1, space has unique and measurable properties which differentiate it from absolute nothingness. Space then is part of the Universe and creation. If there is a 'fundamental element' from which the Universe is constructed, then that fundamental element must constitute space, as well as matter and energy.

Further, even if as in classical physics, space is assumed to be nothing, and it is defined only by the masses and energy which occupy it; that particular 'space' is different from the nothingness which can never be occupied by energy or mass. The nothingness which can never be part of our Universe occurs at the edge of the Universe where the area density of photons is insufficient to create continuous space."(my emphasis)


The full discussion can be had by clicking
HERE