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+// Chapter 4 Example 3
+//==============================================================================
+clc;
+clear;
+
+// input data
+
+lamda   = 0.1*10^-9;         // wavelength of X-rays in m
+theta   = 90;               // angle with incident beam in degrees
+h       = 6.625*10^-34      // plancks constant
+mo      = 9.11*10^-31      // mass in Kg
+c       = 3*10^8;           // vel. of light 
+
+// 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
+lamda1  = lamda+( (h/(mo*c))*(1-cos(theta_r))) // wavelength of scattered beam
+
+// Output
+mprintf('Wavelength of Scattered beam = %3.4f Å',lamda1*10^10);
+//==============================================================================