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diff --git a/3769/CH23/EX23.11/Ex23_11.sce b/3769/CH23/EX23.11/Ex23_11.sce
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+clear
+//Given
+h=6.6*10**-34
+c=3*10**8
+l=2000*10**-10
+w0=4.2*1.6*10**-19
+e=1.6*10**-19
+
+//Calculation
+K=((h*c)/l)-w0
+v0=K/e
+l1=(h*c)/w0
+
+//Result
+printf("\n (i) Potential difference is %0.3f V", v0)
+printf("\n (ii) Wavelength of incident light is %0.0f A",l1*10**10)