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+// Chapter 4 Example 2
+//==============================================================================
+clc;
+clear;
+
+// input data
+theta   = 135;               // angle in degrees
+h       = 6.625*10^-34      // plancks constant
+mo      = 9.1*10^-31       // mass in Kg
+c       = 3*10^8;          // vel. of light in m/s
+
+// Calculatioms
+// from Compton theory ,Compton shift is given by
+// lamda' - lamda = (h/(mo*c))*(1-cosθ)
+theta_r = theta*%pi/180;     // degree to radian conversion
+c_lamda = ( (h/(mo*c))*(1-cos(theta_r))) // Change in wavelength in m
+
+// Output
+mprintf('Change in Wavelength  = %3.5f Å',c_lamda*10^10);
+//==============================================================================