2 files changed, 14 insertions, 0 deletions
diff --git a/1271/CH20/EX20.13/13.txt b/1271/CH20/EX20.13/13.txt
new file mode 100755
index 000000000..ae4204e7b
--- /dev/null
+++ b/1271/CH20/EX20.13/13.txt
@@ -0,0 +1,3 @@
+ # PROBLEM 13 # 
+
+ the value of the ratio of h/e = 4.134667e-15 Jsec/C 
+\ No newline at end of file
diff --git a/1271/CH20/EX20.13/example20_13.sce b/1271/CH20/EX20.13/example20_13.sce
new file mode 100755
index 000000000..beb75fe72
--- /dev/null
+++ b/1271/CH20/EX20.13/example20_13.sce
@@ -0,0 +1,11 @@
+clc 
+// Given that
+lambda = 1.4e-11 // K-absorption edge for lead in m
+V = 88.6e3 // minimum voltage required for producing k-lines in V
+c = 3e8 // speed of light in m/sec
+// Sample Problem 13 on page no. 20.11
+printf("\n # PROBLEM 13 # \n")
+printf("Standard formula used \n ")
+printf(" h*c/Lambda = eV \n")
+r = V * lambda / c
+printf("\n The value of the ratio of h/e = %e Jsec/C.",r)