speed of electromagnetic radiation 2.99792458108 m.s-1 c frequency of electromagnetic Hz f radiation wavelength of electromagnetic radiation surface temperature of object K T surface area of object m2 A Stefan-boltzmann constant 5.669610-8 W.m-2.K-4 power emitted from hot object W P emissivity of object’s surface radiant emittance (spectral (W.m-2).m-1 R intensity): radiated per unit area per unit wavelength interval radiant emittance (spectral (W.m-2).Hz-1 Rf intensity): power radiated per unit area per unit frequency interval Boltzmann constant 1.3806610-23 J.K-1 kB Wien constant: wavelength 2.89810-3 m.K b Wien constant: frequency 2.83 kB / K-1.s-1 bf T h wavelength of peak in solar 5.022510-7 m peak spectrum radius of the Sun 6.96108 m RS radius of the Earth 6.96106 m RE Sun-Earth radius 6.961011 m RSE constant 1.36103 W.m-2 I0 Albedo of Earth’s surface 0.30 Table 1. Summary of the physical quantities used in describing the radiation from hot objects. Sample results: sun.m of the spectral intensity curves: Matlab screen output: sun.m Sun: temperature of photosphere, T_S = 5770 K Peak in Solar Spectrum Theory: Wavelength at peak in spectral intensity, wL = 5.02e-007 m Graph: Wavelength at peak in spectral intensity, wL = 4.98e-007 m Correspondending frequency, f = 6.02e+014 Hz
c speed of electromagnetic radiation 2.99792458108 m.s-1 f frequency of electromagnetic radiation Hz wavelength of electromagnetic radiation T surface temperature of object K A surface area of object m2 Stefan-boltzmann constant 5.669610-8 W.m-2.K-4 P power emitted from hot object W emissivity of object’s surface R radiant emittance (spectral intensity): radiated per unit area per unit wavelength interval (W.m-2).m-1 Rf radiant emittance (spectral intensity): power radiated per unit area per unit frequency interval (W.m-2).Hz-1 kB Boltzmann constant 1.3806610-23 J.K-1 b Wien constant: wavelength 2.89810-3 m.K bf Wien constant: frequency 2.83 kB T / h K-1.s-1 peak wavelength of peak in solar spectrum 5.022510-7 m RS radius of the Sun 6.96108 m RE radius of the Earth 6.96106 m RSE Sun-Earth radius 6.961011 m I0 constant 1.36103 W.m-2 Albedo of Earth’s surface 0.30 Table 1. Summary of the physical quantities used in describing the radiation from hot objects. Sample results: sun.m of the spectral intensity curves: Matlab screen output: sun.m Sun: temperature of photosphere, T_S = 5770 K Peak in Solar Spectrum Theory: Wavelength at peak in spectral intensity, wL = 5.02e-007 m Graph: Wavelength at peak in spectral intensity, wL = 4.98e-007 m Correspondending frequency, f = 6.02e+014 Hz