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02-11-2017, 08:07 PM
Hi Brian
Roger and I are engaged in terminator analysis, but it has just dawned on me (no pun intended) about what we see after the sun sets. The visible spectrum is somewhere around 400 nm to 700 nm, the longest wavelength being in the red portion. That why we get a red sky at night because the suns light is being stretched as it sets ... but what do we see after that ? The spectrum continues into the Infrared band, we can't see this but is it present ? ... sorry if its a strange question.
Duffy
Roger and I are engaged in terminator analysis, but it has just dawned on me (no pun intended) about what we see after the sun sets. The visible spectrum is somewhere around 400 nm to 700 nm, the longest wavelength being in the red portion. That why we get a red sky at night because the suns light is being stretched as it sets ... but what do we see after that ? The spectrum continues into the Infrared band, we can't see this but is it present ? ... sorry if its a strange question.
Duffy