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+//Ex1_5
+
+clc;
+
+//Given:
+
+m=1.66*10^-27;// 1u=1.66*10^-27 kg
+h=6.6262*10^-34;//planck's constant in J.s
+energy1=120;// in Mev for oxygen
+energy2=140;// in MeV for nitrogen
+
+//solution(a):
+
+p=(2*m*16*energy1*(1.6022*10^-13))^0.5;
+wavelength1=h/p*(10)^15;//wavelength in 10^-5 Angstroms
+
+printf("\n The wavelength in 10^-5 Angstroms is = %f ",wavelength1)
+
+//solution (b):
+
+p=(2*m*14*energy2*(1.6022*10^-13))^0.5;
+wavelength2=h/p*(10)^15;//wavelength in 10^-5 Angstroms
+
+printf("\n The wavelength in 10^-5 Angstroms is = %f ",wavelength2)
+
+// 1 Angstrom = 10^-10 m