Laser in front of a wall - mathemathical physics

Join the discussion
Registration is free. Start your own thread to ask a follow-up.
Sign up Log in
31 replies · 3K views
Your earlier definition of ##t_L## was the round-trip duration at a particular angle. In this case, however, you need the times (not durations) of the arrivals back at the origin from two different (but close) angles.
 
Physics news on Phys.org
Right! Ah, how could I miss that -.-

So, total time should be ##t_1=t+t_L## if ##t_L## is the round trip duration. Similar for ##t_2##.

Since the difference ##t_2-t_1## is small, I guess it is the same as if I calculate ##dt## from ##t_1## or from ##t_2##.