Canuke
Enlightened
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jamesraykenney said:
Exactally... I think that is where the danger of looking at someone arc-welding in the distance comes from...It does not SEEM bright, but the point source is VERY bright.
Of course distance DOES matter, otherwise you would leave burnt lines all over your retina every time you looked at the stars at night /ubbthreads/images/graemlins/eek.gif
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There is a point where shrinking angular distance becomes negligible because of optical limitations and/or the wave nature of light. Then it's a function of distance and the object's "absolute" or total luminosity.
jamesraykenney said:
Exactally... I think that is where the danger of looking at someone arc-welding in the distance comes from...It does not SEEM bright, but the point source is VERY bright.
Of course distance DOES matter, otherwise you would leave burnt lines all over your retina every time you looked at the stars at night /ubbthreads/images/graemlins/eek.gif
[/ QUOTE ]
There is a point where shrinking angular distance becomes negligible because of optical limitations and/or the wave nature of light. Then it's a function of distance and the object's "absolute" or total luminosity.
