posted on Nov, 8 2010 @ 06:30 PM
Can I add someting I observed last night, about relative speed, distance and perspective?
Hope this gets through...I was at the airport, sitting facing a window looking at the ramp, at night. A person walked behind me, saw his reflection
on the glass. Coincidentally, a vehicle was on the ramp, driving parallel and same direction as person walking inside the terminal.
His reflection KEPT PACE with the actual vision sight I had, of the vehicle outside, a certain (greater, of course) distance away than the person
passing behind me. Exact match of "apparent" speed. The person? Walking, what...two MPH??
The vehicle? About 20 MPH, I'd guess. Doesn't matter exact speed, it was the illusion, the effect, that matters.
Now, reverse the situation....have a vehicle behind me, instead of the person, and IT is travelling the same speed as the one off in the distance.
ITS reflection will never keep exact pace with the visual of the other vehicle, in that situation.
It's a matter of geometry.
Now, the OP's camera captured something moving at a certain velocity (we don't know it, can't measure it with tools we have) at a certain distance,
but NOT very far away (again, unknown distance, since we don'tknow the relative size of the objects). BUT, the "apparent" velocity is a direct
consequence of the proximity, whatever it was (certainly a matter of tens or at most, a few hundred) feet.