Newtons reflecting telescope had a primary mirror 33mm in diameter. If a dark adapted human eye has a?
raul asked:
diameter of 8mm, how many photons per second could newton detect with the telescope compared to without? 8? 17? 33? 38? 1089? I believe it is 1089 i sqaured the diameter of each and subtracted
Assuming 100% reflectivity of the mirror and he used only one eye
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diameter of 8mm, how many photons per second could newton detect with the telescope compared to without? 8? 17? 33? 38? 1089? I believe it is 1089 i sqaured the diameter of each and subtracted
Assuming 100% reflectivity of the mirror and he used only one eye
March 1st, 2010 at 7:28 pm
Yes, except that the reflectivity of that mirror was no better than around 30%.
I’d take the ratio to make a comparison, rather than subtract. c