I'd never seen this before

"Mxsmanic" wrote in message
...
WingFlaps writes:

So you still think a 1000' tower can be seen over 1000 miles away?

An object 1000' across can be seen at that distance under ideal conditions.

So now the tower is 1000' across as well as 1000' high?

The resolving power of the eye is optimally 30 seconds of arc, a limit imposed
by the actual size of the receptor cells in the retina.


Could the empire state building really be seen 1/3 of the way across the Atlantic?

As long as it is at least 30 seconds across, yes.

IOW you don't know.

Can people in London see the Eiffel tower or people in Paris see
the PO tower in London?

If there are no obstructions in between, absolutely.

Show the math for the limits of resolution. And remember, whichever tower you are using,
you must use the narrower dimension, which would be width, not height.