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authorpriyanka2015-06-24 15:03:17 +0530
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+ # PROBLEM 18 #
+Standard formula used
+ E = (h * c)/ lambda
+
+ Longest wavelength required for photoemission is 5396.739130 Angstrom
diff --git a/1271/CH14/EX14.18/example14_18.sce b/1271/CH14/EX14.18/example14_18.sce
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+clc
+// Given that
+w = 2.3 // work function of sodium in eV
+h = 6.62e-34 // Planck constant in J-sec
+c = 3e8 // speed of light in m/sec
+e = 1.6e-19 // charge on an electron in C
+// Sample Problem 18 on page no. 14.26
+printf("\n # PROBLEM 18 # \n")
+printf("Standard formula used \n ")
+printf(" E = (h * c)/ lambda \n")
+lambda = ((h * c) / w) * (1 / e)
+printf("\n Longest wavelength required for photoemission is %f Angstrom",lambda * 1e10)
+