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// Example 5.28
// Computation of cut off wavelength
// Page no 488
clc;
clear;
close;
// Given data
h=6.626*10^-34; // Planck constant.
c=3*10^8; // Speed of light
Eg= 1.43*1.602*10^-19; // Bandgap energy
// Cut off wavelength
lambda= h*c/Eg;
//Display result on command window
printf("\n Cut off wavelength (micrometer) = %0.3f ",lambda*10^6);
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