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+clc;
+clear all;
+disp("surface temperature of sun")
+lmax=0.49;//mu m
+T=2898/lmax;//mu.m
+disp("K",T, "surface temperature of sun = ")
+
+sigma=5.67*10^(-8);
+Eb=sigma*T^4;//W/m^2
+disp("W/m^2",Eb,"The total rate of energy emmision, Eb =")