initial commit / add all books

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diff --git a/1535/CH9/EX9.1/Ch09Ex1.sci b/1535/CH9/EX9.1/Ch09Ex1.sci
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+// Scilab Code Ex9.1: De-broglie wavelength of an electron from accelerating potential : Page-202 (2010)

+V = 100;    // Accelerating potential for electron, volt

+lambda = sqrt(150/V)*1e-010;    // de-Broglie wavelength of electron, m

+printf("\nThe De-Broglie wavelength of electron = %4.2e m", lambda);

+

+// Result

+// The De-Broglie wavelength of electron = 1.22e-010 m 
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diff --git a/1535/CH9/EX9.14/Ch09Ex14.sci b/1535/CH9/EX9.14/Ch09Ex14.sci
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index 000000000..7a5427600
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+++ b/1535/CH9/EX9.14/Ch09Ex14.sci
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+// Scilab Code Ex9.14: Probability of electron moving in 1D box : Page-207 (2010)

+a = 2e-010;    // Width of 1D box, m

+x1 = 0;    // Position of first extreme of the box, m

+x2 = 1e-010;    // Position of second extreme of the box, m

+P = integrate('2/a*(sin(2*%pi*x/a))^2', 'x', x1, x2);    // The probability of finding the electron between x = 0 and x = 1e-010

+printf("\nThe probability of finding the electron between x = 0 and x = 1e-010 = %3.1f", P);

+

+// Result

+// The probability of finding the electron between x = 0 and x = 1e-010 = 0.5 
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diff --git a/1535/CH9/EX9.2/Ch09Ex2.sci b/1535/CH9/EX9.2/Ch09Ex2.sci
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index 000000000..97c5f5494
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+++ b/1535/CH9/EX9.2/Ch09Ex2.sci
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+// Scilab Code Ex9.2: De-broglie wavelength of an electron from kinetic energy : Page-203 (2010)

+e = 1.6e-019;    // Energy equivalent of 1 eV, J/eV

+h = 6.626e-034;    // Planck's constant, Js

+m = 9.1e-031;    // Mass of the electron, kg

+Ek = 10;    // Kinetic energy of electron, eV

+// Ek = p^2/(2*m), solving for p

+p = sqrt(2*m*Ek*e);    // Momentum of the electron, kg-m/s

+lambda = h/p ;    // de-Broglie wavelength of electron from De-Broglie relation, m

+printf("\nThe de-Broglie wavelength of electron = %4.2e nm", lambda/1e-009);

+

+// Result

+// The de-Broglie wavelength of electron = 3.88e-001 nm 
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diff --git a/1535/CH9/EX9.4/Ch09Ex4.sci b/1535/CH9/EX9.4/Ch09Ex4.sci
new file mode 100755
index 000000000..95c7b9772
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+++ b/1535/CH9/EX9.4/Ch09Ex4.sci
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+// Scilab Code Ex9.4: Uncertainty principle for position and momentum: Page-203 (2010)

+h = 6.626e-034;    // Planck's constant, Js

+m = 9.1e-031;    // Mass of the electron, kg

+v = 1.1e+006;    // Speed of the electron, m/s

+p = m*v;    // Momentum of the electron, kg-m/s

+dp = 0.1/100*p;    // Uncertainty in momentum, kg-m/s

+h_bar = h/(2*%pi);    // Reduced Planck's constant, Js

+// From Heisenberg uncertainty principle,

+// dx*dp = h_bar/2, solving for dx

+dx = h_bar/(2*dp);    // Uncertainty in position, m

+printf("\nThe uncertainty in position of electron = %4.2e m", dx);

+

+// Result

+// The uncertainty in position of electron = 5.27e-008 m 
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diff --git a/1535/CH9/EX9.5/Ch09Ex5.sci b/1535/CH9/EX9.5/Ch09Ex5.sci
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index 000000000..469123bba
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+// Scilab Code Ex9.5: Uncertainty principle for energy and time: Page-203 (2010)

+e = 1.6e-019;    // Energy equivalent of 1 eV, J/eV

+h = 6.626e-034;    // Planck's constant, Js

+dt = 1e-008;    // Uncertainty in time, s

+h_bar = h/(2*%pi);    // Reduced Planck's constant, Js

+// From Heisenberg uncertainty principle,

+// dE*dt = h_bar/2, solving for dE

+dE = h_bar/(2*dt*e);    // Uncertainty in energy of the excited state, m

+printf("\nThe uncertainty in energy of the excited state = %4.2e eV", dE);

+

+// Result

+// The uncertainty in energy of the excited state = 3.30e-008 eV
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diff --git a/1535/CH9/EX9.6/Ch09Ex6.sci b/1535/CH9/EX9.6/Ch09Ex6.sci
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index 000000000..399bd6555
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+++ b/1535/CH9/EX9.6/Ch09Ex6.sci
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+// Scilab Code Ex9.6: Width of spectral line from Uncertainty principle: Page-204 (2010)

+c = 3e+008;    // Speed of light, m/s

+dt = 1e-008;    // Average lifetime, s

+lambda = 400e-009;    // Wavelength of spectral line, m

+// From Heisenberg uncertainty principle,

+// dE = h_bar/(2*dt) and also dE = h*c/lambda^2*d_lambda, which give

+// h_bar/(2*dt) = h*c/lambda^2*d_lambda, solving for d_lambda

+d_lambda = lambda^2/(4*%pi*c*dt);    // Width of spectral line, m

+printf("\nThe width of spectral line = %4.2e m", d_lambda);

+

+// Result

+// The width of spectral line = 4.24e-015 m 
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