Is glide path the same for all aircraft when it comes to vasi and papi lights? For instance, if I'm flying a Cessna 182 and see two white lights and two red lights, I am on the proper glide path. Would a Boeing 747 see two whites and two reds at the same angle/altitude as the Cessna?
How was proper glide path established in the first place?
As a side, can "glide path" and "glide slope" be used interchangibly?