laser level for line on curved surface?
In article , Martin H.
Eastburn says...
on a water tower at night. That is 14 miles of round trip and droppoff by the
square of the distance.
My understanding is that because that is not a point source,
the 1/R(sq) law does not apply. Of course it's still a long way
for a laser pointer like that.
Jim
==================================================
please reply to:
JRR(zero) at yktvmv (dot) vnet (dot) ibm (dot) com
==================================================
|