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authorpriyanka2015-06-24 15:03:17 +0530
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+ # PROBLEM 47 #
+Standard formula used
+ lambda = h/(m*v)
+
+ Group velocity is 6.062271e+06 m/sec.
+ Phase velocity is 3.031136e+06 m/sec.
diff --git a/1271/CH14/EX14.47/example14_47.sce b/1271/CH14/EX14.47/example14_47.sce
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+clc
+// Given that
+lambda = 1.2e-10 // DE Broglie wavelength in m
+c = 3e8 // velocity of light in m/sec
+h = 6.62e-34 // Planck constant in J-sec
+e = 1.6e-19 // charge on an electron in C
+m = 9.1e-31 // mass of electron in kg
+// Sample Problem 47 on page no. 14.40
+printf("\n # PROBLEM 47 # \n")
+printf("Standard formula used \n ")
+printf(" lambda = h/(m*v)\n")
+v1 = h / (m * lambda)
+v2 = h / (2 * m * lambda)
+printf("\n Group velocity is %e m/sec.\n Phase velocity is %e m/sec.",v1,v2)
+