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Diffstat (limited to '2912/CH5/EX5.8/Ex5_8.sce')
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1 files changed, 21 insertions, 0 deletions
diff --git a/2912/CH5/EX5.8/Ex5_8.sce b/2912/CH5/EX5.8/Ex5_8.sce new file mode 100755 index 000000000..418eb27c5 --- /dev/null +++ b/2912/CH5/EX5.8/Ex5_8.sce @@ -0,0 +1,21 @@ +//chapter 5
+//example 5.8
+//Calculate de-Broglie wavelength
+//page 106
+clear;
+clc;
+//given
+T=400; // in K (temperature)
+m=6.7E-27; // in Kg (mass of He-atom)
+h=6.6E-34; // in J-s (Planck's constant)
+k=1.376E-23; // in J/degree (Boltzmann constant)
+//calculate
+// Since lambda=h/(m*v)
+// E=mv^2/2;
+// Therefore lambda=h/sqrt(2*m*E)
+//E=kT
+//Therefore lambda=h/sqrt(2*m*k*T)
+lambda=h/sqrt(2*m*k*T)
+printf('\nThe de-Broglie wavelength of He-atom is \t=%1.4E m',lambda);
+lambda=lambda*1E10; //changing unit from m to Angstrom
+printf('\n\t\t\t\t\t\t=%.4f Angstrom',lambda);
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