Because as we approach the speed of light, time gets slower for us so for a photon traveling at "speed of light" wouldn't the time become "0" or like stopped, yet it takes time for light to travel.
also as light would travel some distance in some given time, for a photon time is really non-existent thus how do we know that it even travels or not. Or would time get -ve after the speed of light?
I'm so sorry if this sounds confusing, but it's been bothering me for a while now. I would be pleased to be corrected, thanks in advance!!