Compare the plot for intensity vs wavelength for Black body radiation for Planck’s law and Wien’s law at different temperature in scilab.

 Q2: 1. Compare the plot for intensity vs wavelength for Black body radiation for                          Planck’s law and Wien’s law at different temperature.

AIM OF THE EXPERIMENT:

To compare the plot for intensity vs wavelength for Black body radiation for Plank’s             law and Wien’s law at different temperature.

REQUISITES:

A PC/laptop.

Scilab 6.0.0 must be installed.

CODING:

clc;
clear all;
c=3*10^8;
h=6.625*10.^-34;
k=1.38*10.^-23;
Lam=(0.0:0.01:20).*1e-6;
figure(1)
for i=500:100:700
I1(:,i)= ((2*h*c*c)./(Lam.^5)).*(exp(-(h*c)./(Lam*k*i)));
I2(:,i)=(2*h*c*c)./((Lam.^5).*(exp((h.*c)./(k.*i.*Lam))-1));
plot(Lam,I1(:,i),'linewidth',2)
plot(Lam,I2(:,i),'r','linewidth',2)
end
 xlabel('lambda','fontsize',4)
 ylabel('Intensity','fontsize',4)
 title('Blackbody Radiation','fontsize',4)
 legend('Wien law','Planks law')

 fh = figure(1);
 set(fh, 'color', 'white');

OUTPUT:

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