Gene Fuller wrote:
Cecil Moore wrote:
Gene Fuller wrote:
The definition of irradiance, according to NIST, is power per unit
area. The standard units are W/m2 or lumen/m2.

Exactly how much power can exist in a zero unit of
time?

You previously objected to things that don't match
the real world. Instantaneous irradiance would rely
on an infinitesimally small amount of time, something
that doesn't match reality very well. One would think
you would therefore object to the concept of instantaneous
irradiance since it cannot be measured in reality and
exists only in the math model in the human mind.

Still spinning the words, huh? Do you really think that "time-averaged"
and "zero" time are the only possible choices?

Do you disagree with NIST?

73,
Gene
W4SZ

Cecil must have flunked calculus. Also, differential calculus is
the life-blood of classical electromagnetic theory. The ancients used
it liberally. Cecil probably doesn't believe in speed, because speed is
also an instantaneous quantity. Maybe he can use his argument on the
next ham-fisted Texas trooper who stops him for speeding on his motorcycle.
73,
Tom Donaly, KA6RUH