Hi there, the light intensity is normally the flux of light in a given area or volume. I suppose at some really huge limit there might be a theoretical maximum as to how many photons you can fit in an area, but I’ve no idea what this number is!
Do you mean like luminous flux per area? There would be, as that’d be a ratio of how many photos there were in an area, both of which are finite quantities.
But also in terms of what we can see, yes there is then too. That is because of how our eyes work and the fact that we’d be blinded if we looked at something too bright!
Huh. Stumped on this one. Do you think you could get photon degeneracy of some sort – off the top of my head I can’t think of any limiting factor, nor can I conjoir up any scenario excluding possibly the big bang where this might occur. Another one for my coffee break!