clc 
// Given that
lambda = 1e-10 // wavelength of light in meter
theta = 90 // angle in degree
h = 6.62e-34 // Planck constant in J-sec
c = 3e8 // speed of light in m/sec
e = 1.6e-19 // charge on an electron in C 
m = 9.1e-31 // mass of an electron in kg
// Sample Problem 26 on page no. 14.31
printf("\n # PROBLEM 26 # \n")
printf("Standard formula used \n ")
printf(" delta_lambda = (h / (m * c) * (1 - cos(theta))) \n E = h*c*(1/lambda1 - 1/lambda2)\n")
delta_lambda = (h * (1 - cosd(theta))) / (m * c)
E = (h * c) * ((1 / lambda) - (1 / (lambda + delta_lambda)))
printf("\n Compton shift is %e m.\n Kinetic energy is %f eV.",delta_lambda,E / 1.6e-19)