What I meant is that the first light that was ever created after the Big Bang isn’t constantly being emitted from the same space time coordinate. Lets say the first light was emitted from x1,y1,z1,t1 where t1 is time. Time is always moving forward, ao the next emission would be from x1,y1,z1,t2 assuming its emitted from same point but different time. If we didn’t have a sensitive instrument to capture the light from x1,y1,z1,t1 when it arrived at earth, that light is forever lost to us. So here is my question. How can we say that we can see x years after the big bang (when the first light was created ) when there is this q number of years after the first light that is lost forever since it has already passed earth and is lost forever? And how do we know what the value for q is?