initial commit / add all books

6 files changed, 77 insertions, 0 deletions

diff --git a/1535/CH11/EX11.1/Ch11Ex1.sci b/1535/CH11/EX11.1/Ch11Ex1.sci
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index 000000000..34574b87e
--- /dev/null
+++ b/1535/CH11/EX11.1/Ch11Ex1.sci
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+// Scilab Code Ex11.1: Page-249 (2010)

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

+c = 3e+08;    // Speed of light in free space, m/s

+k = 1.38e-023;    // Boltzmann constant, J/K

+T = 300;    // Temperature at absolute scale, K

+lambda = 5500e-010;    // Wavelength of visible light, m

+rate_ratio = exp(h*c/(lambda*k*T))-1;    // Ratio of spontaneous emission to stimulated emission

+printf("\nThe ratio of spontaneous emission to stimulated emission for visible region = %1.0e", rate_ratio);

+lambda = 1e-02;    // Wavelength of microwave, m

+rate_ratio = exp(h*c/(lambda*k*T))-1;    // Ratio of spontaneous emission to stimulated emission

+printf("\nThe ratio of spontaneous emission to stimulated emission for microwave region = %6.4f", rate_ratio);

+

+// Result

+// The ratio of spontaneous emission to stimulated emission for visible region = 8e+037

+// The ratio of spontaneous emission to stimulated emission for microwave region = 0.0048
\ No newline at end of file
diff --git a/1535/CH11/EX11.2/Ch11Ex2.sci b/1535/CH11/EX11.2/Ch11Ex2.sci
new file mode 100755
index 000000000..cec5f5f5a
--- /dev/null
+++ b/1535/CH11/EX11.2/Ch11Ex2.sci
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+// Scilab Code Ex11.2: Page-250 (2010)

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

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

+c = 3e+08;    // Speed of light in free space, m/s

+lambda = 690e-009;    // Wavelength of laser light, m

+E_lower = 30.5;    // Energy of lower state, eV

+E = h*c/(lambda*e);    // Energy of the laser light, eV

+E_ex = E_lower + E;    // Energy of excited state of laser system, eV

+printf("\nThe energy of excited state of laser system = %4.1f eV", E_ex);

+

+// Result

+// The energy of excited state of laser system = 32.3 eV

diff --git a/1535/CH11/EX11.3/Ch11Ex3.sci b/1535/CH11/EX11.3/Ch11Ex3.sci
new file mode 100755
index 000000000..5618fdadb
--- /dev/null
+++ b/1535/CH11/EX11.3/Ch11Ex3.sci
@@ -0,0 +1,10 @@
+// Scilab Code Ex11.3: Page-250 (2010)

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

+k = 1.38e-023;    // Boltzmann constant, J/K

+// Stimulated Emission = Spontaneous Emission <=> exp(h*f/(k*T))-1 = 1 i.e.

+// f/T = log(2)*k/h = A

+A =  log(2)*k/h;    // Frequency per unit temperature, Hz/K

+printf("\nThe stimulated emission equals spontaneous emission iff f/T = %4.2e Hz/K", A);

+

+// Result

+// The stimulated emission equals spontaneous emission iff f/T = 1.44e+010 Hz/K 
\ No newline at end of file
diff --git a/1535/CH11/EX11.4/Ch11Ex4.sci b/1535/CH11/EX11.4/Ch11Ex4.sci
new file mode 100755
index 000000000..a8a76c654
--- /dev/null
+++ b/1535/CH11/EX11.4/Ch11Ex4.sci
@@ -0,0 +1,14 @@
+// Scilab Code Ex11.4: Page-250 (2010)

+lambda = 500e-009;    // Wavelength of laser light, m

+f = 15e-02;    // Focal length of the lens, m

+d = 2e-02;    // Diameter of the aperture of source, m

+a = d/2;    // Radius of the aperture of source, m

+P = 5e-003;    // Power of the laser, W

+A = %pi*lambda^2*f^2/a^2;    // Area of the spot at the focal plane, metre square

+I = P/A;    // Intensity at the focus, W per metre square    

+printf("\nThe area of the spot at the focal plane = %4.2e metre square", A);

+printf("\nThe intensity at the focus = %4.2e watt per metre square", I);

+

+// Result

+// The area of the spot at the focal plane = 1.77e-010 metre square

+// The intensity at the focus = 2.83e+007 watt per metre square 
\ No newline at end of file
diff --git a/1535/CH11/EX11.5/Ch11Ex5.sci b/1535/CH11/EX11.5/Ch11Ex5.sci
new file mode 100755
index 000000000..290632dfa
--- /dev/null
+++ b/1535/CH11/EX11.5/Ch11Ex5.sci
@@ -0,0 +1,14 @@
+// Scilab Code Ex11.5: Page-251 (2010)

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

+c = 3e+08;    // Speed of light in free space, m/s

+lambda = 1064e-009;    // Wavelength of laser light, m

+P = 0.8;    // Average power output per laser pulse, W

+dt = 25e-003;    // Pulse width of laser, s

+E = P*dt;    // Energy released per pulse, J

+N = E/(h*c/lambda);    // Number of photons in a pulse

+printf("\nThe energy released per pulse = %2.0e J", E);

+printf("\nThe number of photons in a pulse = %4.2e", N);

+

+// Result

+// The energy released per pulse = 2e-002 J

+// The number of photons in a pulse = 1.07e+017 
\ No newline at end of file
diff --git a/1535/CH11/EX11.6/Ch11Ex6.sci b/1535/CH11/EX11.6/Ch11Ex6.sci
new file mode 100755
index 000000000..2ecd57e6d
--- /dev/null
+++ b/1535/CH11/EX11.6/Ch11Ex6.sci
@@ -0,0 +1,12 @@
+// Scilab Code Ex11.6:Page-251 (2010)

+lambda = 693e-009;    // Wavelength of laser beam, m

+D = 3e-003;    // Diameter of laser beam, m

+d_theta = 1.22*lambda/D;    // Angular spread of laser beam, rad

+d = 300e+003;    // Height of a satellite above the surface of earth, m

+a = d_theta*d;    // Diameter of the beam on the satellite, m

+printf("\nThe height of a satellite above the surface of earth = %4.2e rad", d_theta);

+printf("\nThe diameter of the beam on the satellite = %4.1f m", a);

+

+// Result

+// The height of a satellite above the surface of earth = 2.82e-004 rad

+// The diameter of the beam on the satellite = 84.5 m 
\ No newline at end of file