;ò ±Fc@sndZdklZlZlZdklZdkZdefd„ƒYZ[[[dk l Z d„Z dS(sXDescription of thermal radiation. $Id: thermal.py,v 1.3 2007/03/24 16:11:59 eddy Exp $ (sThermalsQuantumsVacuum(sObjectNsRadiatorcBsftZdZd„Zeid„Zeiei d„Z e e e e i eieie id„ZRS(s&Descriptor for a black-body radiator. cOs'tti|f||ƒ||_dS(N(sapplysObjects__init__sselfsargsswhats temperatures_Radiator__temperature(sselfs temperaturesargsswhat((s)/home/eddy/.sys/py/study/chemy/thermal.pys__init__ scCs|id|SdS(s§Computes the power output per unit area of exposed surface. To compute total power output, allowing (if the body isn't convex) for re-absorption of some of what it emits, I suspect you should multiply radiance by the surface area of the body's convex hull, rather than its actual surface area. The product is then the rate of loss of energy, due to thermal radiation, of the body. iN(sselfs_Radiator__temperaturesS(sselfsignoredsS((s)/home/eddy/.sys/py/study/chemy/thermal.pys_lazy_get_total_scCs||iSdS(s'Constant needed by spectral: h / (k.T).N(shoverksselfs_Radiator__temperature(sselfsignoredshoverk((s)/home/eddy/.sys/py/study/chemy/thermal.pys_lazy_get__hoverkT_sc Cs°|o$|id|d|ƒd|Sn0|o |}n|o||}n td‚d|||i |ƒd} |o| |d|dSn| |d|dSdS(sóReturns spectral radiance. Takes any one of three arguments, in the order nu, frequency, wavelength, the former being the `angular' frequency of the radiation, frequency/(2*pi). If more than one is given, the first in the above ordering (which is their positional order) is used, any others are ignored. Returns the radiance (power output per unit area) of the body, per unit variation in the given argument, produced in a narrow portion of the spectrum about the given position in the spectrum. Since this is `per unit', the answer depends on which argument you supplied not only for how the argument is read but also in how the power density varies with that argument. s frequencyis,Either zero input or none given: unphysical.iiiN( snusselfsspectralspis frequencysfs wavelengthscs ValueErrorshsexps_hoverkTsbase( sselfsnus frequencys wavelengthsexpshscspisfsbase((s)/home/eddy/.sys/py/study/chemy/thermal.pysspectral"s$  (s__name__s __module__s__doc__s__init__sThermalsStefans_lazy_get_total_sQuantumshsks_lazy_get__hoverkT_sNonesmathsexpsVacuumscspisspectral(((s)/home/eddy/.sys/py/study/chemy/thermal.pysRadiator s   (sKelvincOsÅy|d}WnZtj oN|tdjo |}qª|dt}|tdjo td‚qªnAX|djo|t}n%|djo td‚n |t}tt|f||ƒSdS(s×Wrap Radiator with provision for -ve temperatures (in Centigrade). This isn't the right way to wrap it, but if any wrapping's to be done, it should be done here, not by bodging Radiator's __init__ method ! f273.14999999999998is5Negative temperature, even after coercion by 273.15 KN( s temperaturesTs TypeErrorsKelvins ValueErrorsapplysRadiatorsargsswhat(s temperaturesargsswhatsT((s)/home/eddy/.sys/py/study/chemy/thermal.pysradiator>s     ( s__doc__sphysicssThermalsQuantumsVacuumsstudy.value.objectsObjectsmathsRadiatorsstudy.value.unitssKelvinsradiator(sradiatorsRadiatorsKelvinsObjectsThermalsVacuumsQuantumsmath((s)/home/eddy/.sys/py/study/chemy/thermal.pys?s  0