initial commit / add all books

1 files changed, 26 insertions, 0 deletions

diff --git a/2258/CH1/EX1.20/1_20.sce b/2258/CH1/EX1.20/1_20.sce
new file mode 100755
index 000000000..678faefbf
--- /dev/null
+++ b/2258/CH1/EX1.20/1_20.sce
@@ -0,0 +1,26 @@
+clc();

+clear;

+// To calculate the energies of electron

+n2=2;    //second quantum state

+n4=4;    //fourth quantum state

+h=6.626*10^-34;

+m=9.1*10^-31;   //mass in kg

+a=2;   //potential box length in armstrong

+a=a*10^-10;    //length in m

+A=n2^2*h^2;

+B=8*m*a^2;

+E2=A/B;    //energy in j

+E2eV=E2/(1.6*10^-19);    //energy in eV

+C=n4^2*h^2;

+E4=C/B;    //energy in j

+E4eV=E4/(1.6*10^-19);    //energy in eV

+printf("energy corresponding to second quantum state in Joule is");

+disp(E2);

+printf("energy corresponding to second quantum state in eV is");

+disp(E2eV);

+printf("energy corresponding to fourth quantum state in Joule is");

+disp(E4);

+printf("energy corresponding to fourth quantum state in eV is");

+disp(E4eV);

+

+//answers given in the book are wrong