initial commit / add all books

2 files changed, 27 insertions, 0 deletions

diff --git a/1271/CH15/EX15.21/21.txt b/1271/CH15/EX15.21/21.txt
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+++ b/1271/CH15/EX15.21/21.txt
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+ # PROBLEM 21 # 

+Standard formula used 

+ E = (n^2 * h^2) / (8 * m * L^2)) 

+

+ Energy Eigen values -

+ For (n=2) for 80.000000 eV.

+ For (n=3) is 180.000000 eV.

+ For (n=4) is 320.000000 eV.

diff --git a/1271/CH15/EX15.21/example15_21.sce b/1271/CH15/EX15.21/example15_21.sce
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index 000000000..bcd2d5560
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+++ b/1271/CH15/EX15.21/example15_21.sce
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+clc 
+// Given that
+E1 = 3.2e-18 // minimum energy possible for a particle entrapped in a one dimensional box in J
+e = 1.6e-19 // charge on an electron in C
+m = 9.1e-31 // mass of electron in kg
+c = 3e8 // speed of light in m/sec
+h = 6.62e-34 // Planck constant in J-sec
+// Sample Problem 21 on page no. 15.32
+printf("\n # PROBLEM 21 # \n")
+printf("Standard formula used \n")
+printf(" E = (n^2 * h^2) / (8 * m * L^2)) \n")
+E1 = E1 / e // in eV
+n = 2 // for n=2
+E2 = n^2 * E1
+n = 3 // for n=3
+E3 = n^2 * E1
+n = 4 // for n=4
+E4 = n^2 * E1
+printf("\n Energy Eigen values -\n For (n=2) for %f eV.\n For (n=3) is %f eV.\n For (n=4) is %f eV.",E2,E3,E4)