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+//Chapter 4 : Laser and Holography
+
+clear;
+
+//Variable declaration
+lamda=6328*10**-10      //wavelength
+h=6.63*10**-34          //planck's constant
+c=3*10**8               //speed of light
+
+//Calculations
+E=((h*c)/lamda)/1.6*10**19
+Momentum=h/lamda/10**-27
+
+//Result
+mprintf("Energy of radiation= %f eV",E)
+mprintf("\nMomentum of electron= %f*10**-27 kgm/s",Momentum)
+