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diff --git a/1061/CH9/EX9.7/Ex9_7.sce b/1061/CH9/EX9.7/Ex9_7.sce
new file mode 100755
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+//Ex:9.7
+clc;
+clear;
+close;
+n=0.65;// quantum efficiency
+e=1.602*10^-19;// charge
+h=6.626*10^-34;// plank constant
+c=3*10^8;// speed of light in m/s
+y=0.85*10^-6// wavelength in m
+R=(n*e*y)/(h*c);// responsivity in A/W
+Po=0.35*10^-6;// in W
+Ip=R*Po;// output photo current
+I=9*10^-6;// output current in A
+M=I/Ip;// multiplication factor
+M1=ceil(M);
+printf("The multiplication factor =%d", M1);
+\ No newline at end of file