1 files changed, 19 insertions, 0 deletions
diff --git a/3768/CH3/EX3.9/Ex3_9.sce b/3768/CH3/EX3.9/Ex3_9.sce
new file mode 100644
index 000000000..3d3408c8c
--- /dev/null
+++ b/3768/CH3/EX3.9/Ex3_9.sce
@@ -0,0 +1,19 @@
+//Example number 3.9, Page number 49
+clc;clear;
+close;
+
+//Variable declaration
+h1=1;
+k1=0;
+l1=0;    //miller indices of (100)
+h2=1;
+k2=1;
+l2=0;    //miller indices of (110)
+a=0.287;    //lattice constant(nm)
+//Calculation
+d100=a/sqrt(h1**2+k1**2+l1**2);    //spacing(nm)
+d110=a/sqrt(h2**2+k2**2+l2**2);    //spacing(nm)
+rho=2/(sqrt(2)*(d100*10**-9)**2);    //number of atoms(per mm**2)
+//Result
+printf("number of atoms is %.3E atoms/mm^2",rho)
+//answer in the book is wrong