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+// Scilab Code Ex11.5: Page-251 (2010)
+h = 6.626e-034;    // Planck's constant, Js
+c = 3e+08;    // Speed of light in free space, m/s
+lambda = 1064e-009;    // Wavelength of laser light, m
+P = 0.8;    // Average power output per laser pulse, W
+dt = 25e-003;    // Pulse width of laser, s
+E = P*dt;    // Energy released per pulse, J
+N = E/(h*c/lambda);    // Number of photons in a pulse
+printf("\nThe energy released per pulse = %2.0e J", E);
+printf("\nThe number of photons in a pulse = %4.2e", N);
+
+// Result
+// The energy released per pulse = 2e-002 J
+// The number of photons in a pulse = 1.07e+017 
+\ No newline at end of file