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+ clc
+//given that
+M = 6e24 // Mass of earth in Kg
+v = 3e4 // Orbital velocity of earth in m/s
+h = 6.625e-34 // Plank constant
+
+printf("Example 1.1")
+lambda = h/(M*v) // calculation of de Broglie wavelength
+
+printf("\n de Broglie wavelength of earth is %e m.\n\n\n",lambda)