# Re: Light output of dimmed lamps

 Please Register and login to reply and use other advanced options Posted by nicksanspam on December 24, 2005, 9:15 pm There would always be some visible light, but it's very faint at low temps :-) 20 PI=4*ATN(1) 30 LAMBDAU=7.8E-07'upper visible limit (meters) 40 LAMBDAL=3.8E-07'lower visible limit (meters) 50 FOR LT=2 TO 4'log F temp 60 TF^LT'temp (F) 70 TK=(TF+460)/1.8'temp (K) 80 GAM=.0143879/(LAMBDAU*TK)'Pivovonsky and Nagel (1961) polynomial term 90 CFRACU=0'initialize upper cumulative fraction 100 FOR M=1 TO 3 110 TERM/(PI^4)*(((M*GAM+3)*M*GAM+6)*M*GAM+6) 120 CFRACURACU+EXP(-M*GAM)/(M^4)*TERM 130 NEXT M 140 GAM=.0143879/(LAMBDAL*TK) 150 CFRACL=0 160 FOR M=1 TO 3 170 TERM/(PI^4)*(((M*GAM+3)*M*GAM+6)*M*GAM+6) 180 CFRACLRACL+EXP(-M*GAM)/(M^4)*TERM 190 NEXT M 200 P=5.6697E-08*(TK^4)'total emissive power (W/m^2) 210 EFRACRACU-CFRACL'fraction of emissive power in visible spectrum 220 PRINT TF,EFRAC,P,EFRAC*P 230 NEXT temp          visible fraction    total power      visible power 100   F       6.010933E-22        531.1561 W/m^2   3.192744E-19 W/m^2 1000          2.753038E-07        24540.4          6.756065E-03 10000         .4668266            6.465423E+07     3.018231E+07 Nick This Thread Bookmark this thread:               Subject Author Date   Re: Light output of dimmed lamps nicksanspam 12-24-2005 please rate this thread Please Register and login to reply and use other advanced options Latest Posts