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diff --git a/1694/CH2/EX2.16/EX2_16.sce b/1694/CH2/EX2.16/EX2_16.sce
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+clear;
+clc;
+printf("\nEx2.16\n");
+//page no.-64
+//given
+m=9.11*10^-31;.............//mass of e in kg
+E=1.6*10^-19;..............//energy in joule
+h=6.625*10^-34;.............//planck's constant
+//we knoe , E=m*v^2/2
+
+v=sqrt((2*E)/m);..........//velocity in m/s
+//By debroglie relationship
+
+lambda=h/sqrt(2*m*E)...........//wavelength in m
+
+printf("\nwavelength is 12.3 angstrom\n");