Undertone

{EDIT} I just saw the notice about the speculation thread. Trying to delete here and move there. SORRY! I am sorry as I am trying to understand more about photons and how they work so this might sound dumb, but I was thinking about a problem/theory that needed some greater help. Also, sorry if this post is not appropriate for this thread, quantum theory seemed a good place to start on the topic of photons. Please, educate me on the topic! Any help/links/suggestions is appreciated. First: Do photons travel in a straight line? Second: How long does a photon last/exist? Third: Do/can photons bounce/ricochet? (assuming the surface does not absorb/diffuse/etc) Fourth: Can photons paths be predicable? Example: Using a photon as a cue ball on a pool table, if the photon is moving in a direction and hits the wall in the same place every time from the same angle, would it deflect/ricochet in a predicable fashion? Fifth: In knowing the trajectory from the fourth question, could you back track the photons path to the point of collision, and beyond? Sixth: Is it possible to use this data as a way to see the position of objects the photons bounced from/off of, a previous space/time where the photons bounced? Ie a form of time travel, or rather seeing the position of objects/forms in the past through photonic prediction. At least in my head in its basic form/understanding, theoretically, wouldn't you be able to predict where an object was in space time by following the paths of a photons travel? It seems like it would work like radar, using all the bounces and trajectories, to form an image of an object moving in space time, yet able to see where the object was but no longer from the data of paths and bounces. The history, as it were, of the photons path. The variables of course are enormous for anything functional as a "time travel" device itself, but in a controlled, minimal/basic test, could it be reproduced? Has it already been done?