>>4139589>>4139825pls no bully but I don't find these answers satisfactory
>>4139825I never made any claims of my own, in fact I explicitly said the marker is indeed correct. I'm asking why it's correct.
>>4139589What's so special about the transition from <700nm to >700nm? The boundary we put between very deep visible red and IR is entirely a human construct, and the physics surely changes far less in say 20nm across that boundary than in the 300nm across the visible spectrum.