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One misconception that I've come across,//
is that the hemisphere tilted away from the sun is in winter
because it's further from the sun, and likewise the summer side is in
summer because being tilted towards the sun it's closer to it.
I take it that "light flux" (above) means the watts per square metre, while
"illumination" refers to the fact that a given square metre is illuminated
for more hours per day in summer. //. It would be interesting to determine the
relative contributions of the two factors.
Mark
Mark Sylvester