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diff --git a/1694/CH2/EX2.2/EX2_2.sce b/1694/CH2/EX2.2/EX2_2.sce
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+clear;
+clc;
+printf("\nEx2.2\n");
+//page no.-55
+//given
+h=6.625*10^-34;...........//planck's constant in J-s
+m=1.675*10^-27;.........//mass of neutron in Kg
+E=1.6*10^-5;.............//kinetic energy of neutron
+//we knoe , E=m*v^2/2
+
+v=sqrt((2*E)/m);..........//velocity in m/s
+//By debroglie relationship
+
+lambda=h/(m*v)...............//De-Broglie wavelength in m
+
+printf("\nDe-Broglie wavelength is 2.86*10^-15 m\n");