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+// Scilab code Ex1.1 : Pg:18 (2008)

+clc;clear;

+e = 1.6e-019;    // Energy equivalent of 1 eV, J

+m = 0.05;    // Mass of the golf ball, kg

+v = 20;    // Velocity of golf ball, m/s

+h = 6.625e-034;    // Planck's constant, joule-sec

+Lambda1 = h/(m*v);    // de Broglie wavelength of a golf ball, m

+m = 1.67e-027;    // mass of proton, kg

+v = 2200;    // Velocity of proton, m/s

+Lambda2 = h/(m*v);    // de Broglie wavelength of a proton, m

+E = 10*e;    // Kinetic energy of an electron, eV

+m = 9.11e-031;    // Mass of electron, kg

+Lambda3 = h/sqrt(2*m*E);    // de Broglie wavelength of an electron, m

+printf("\nThe de-Broglie wavelength of a golf ball = %5.3e m", Lambda1);

+printf("\nThe de-Broglie wavelength of a proton = %4.2e m", Lambda2);

+printf("\nThe de-Broglie wavelength of a electron = %3.1f m", Lambda3/1e-010);

+

+// Result 

+// The de-Broglie wavelength of a golf ball = 6.625e-034 m

+// The de-Broglie wavelength of a proton = 1.80e-010 m

+// The de-Broglie wavelength of a electron = 3.9 m
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