I think I speak for many of us when I say What. The. Hell? For those of you loathe to click links without explanation, that leads to Mr. Thein's unbelievably muddled and error-filled discussion of photographic light. I will note only the picture of the Point Source with the "defined shadow with soft edges" (say whaaat?) and the weird definition of Intensity which seems to be trying to capture somehow both the actual intensity of the light and its falloff.
I have to wonder if the rest of Hasselblad's Ambassadors are this technically ill-informed.