13 files changed, 122 insertions, 0 deletions
diff --git a/3020/CH11/EX11.1/ex11_1.sce b/3020/CH11/EX11.1/ex11_1.sce
new file mode 100755
index 000000000..51b024fa4
--- /dev/null
+++ b/3020/CH11/EX11.1/ex11_1.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+lambda = 5900e-10; // Wavelength of the sodium D line in meters
+c = 3e8;// Velocity of air
+h = 6.626e-34; // Plancks constant
+e = 1.602e-19; // Charge of an electron
+E = (h*c)/(lambda*e);
+disp('eV',E,'The energy of the first excited state is')
diff --git a/3020/CH11/EX11.10/ex11_10.sce b/3020/CH11/EX11.10/ex11_10.sce
new file mode 100755
index 000000000..37208b467
--- /dev/null
+++ b/3020/CH11/EX11.10/ex11_10.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+lambda = 4961e-10 ; // Wavelengh of green light from mercury lamp
+E = (h*c)/lambda; // Energy of each photon emitted 
+N = 1/E ; // Number of photons rquired to do one joule of work
+disp('m^-3',N,'The number of photons from green light of mercury is')
diff --git a/3020/CH11/EX11.11/ex11_11.sce b/3020/CH11/EX11.11/ex11_11.sce
new file mode 100755
index 000000000..99e47a88a
--- /dev/null
+++ b/3020/CH11/EX11.11/ex11_11.sce
@@ -0,0 +1,9 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+e = 1.609e-19; // Charge of an electron
+Eg = 0.8*e ; // Band gap of given semiconductor in joule
+lambda = (h*c)/Eg; // Wavelength of emitted radiation 
+disp('m',lambda,'Wavelength of emitted radiation is')
+// Slight variation in the answer as compared to book... Checked in calculator... Book's mistake
diff --git a/3020/CH11/EX11.12/ex11_12.sce b/3020/CH11/EX11.12/ex11_12.sce
new file mode 100755
index 000000000..ce909155b
--- /dev/null
+++ b/3020/CH11/EX11.12/ex11_12.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+e = 1.609e-19; // Charge of an electron
+Eg = 1.44*e ; // Band gap of given GaAs semiconductor in joule
+lambda = ((h*c)/Eg)*1e6; // Wavelength of emitted from given GaAs semicinductor is 
+disp('um',lambda,'Wavelength of emitted from given GaAs semicinductor is')
diff --git a/3020/CH11/EX11.13/ex11_13.sce b/3020/CH11/EX11.13/ex11_13.sce
new file mode 100755
index 000000000..7433cd43f
--- /dev/null
+++ b/3020/CH11/EX11.13/ex11_13.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+e = 1.609e-19; // Charge of an electron
+Eg = 3.0*e ; // Band gap of given GaAs semiconductor in joule
+lambda = ((h*c)/Eg)*1e6; // Wavelength of emitted from given GaAs semicinductor is 
+disp('um',lambda,'Wavelength of emitted from given GaAs semicinductor is')
diff --git a/3020/CH11/EX11.2/ex11_2.sce b/3020/CH11/EX11.2/ex11_2.sce
new file mode 100755
index 000000000..bbbb796ad
--- /dev/null
+++ b/3020/CH11/EX11.2/ex11_2.sce
@@ -0,0 +1,10 @@
+clc;
+clear all;
+T = 523; // Temperature in kelvin
+c = 3e8;// Velocity of air
+h = 6.626e-34; // Planck's constant
+k = 1.38e-23; // Boltzmann's constant
+e = 1.602e-19; // Charge of an electron
+lambda = 5900e-10; // Wavelength of light in meters
+r = exp(-((h*c)/(k*T*lambda))); // R =(N2/N1) Ratio between the atoms in the first excited state and ground state
+disp('',r,'Ratio between the atoms in the first excited state and ground state')
diff --git a/3020/CH11/EX11.3/ex11_3.sce b/3020/CH11/EX11.3/ex11_3.sce
new file mode 100755
index 000000000..6afb08b88
--- /dev/null
+++ b/3020/CH11/EX11.3/ex11_3.sce
@@ -0,0 +1,11 @@
+clc;
+clear all;
+T = 523; // Temperature in kelvin
+c = 3e8;// Velocity of air
+h = 6.626e-34; // Plancks constant
+k = 1.38e-23; // Boltzmanns constant
+e = 1.602e-19; // Charge of an electron
+lambda = 5900e-10; // Wavelength of light in meters
+r = exp(((h*c)/(k*T*lambda))); // Temporary variable
+t = (1/(r-1)); //t =(Stimulated emission/Spontaneous emission) 
+disp('',t,'Ratio between stimulated emission and spontaneous emission')
diff --git a/3020/CH11/EX11.4/ex11_4.sce b/3020/CH11/EX11.4/ex11_4.sce
new file mode 100755
index 000000000..c227765aa
--- /dev/null
+++ b/3020/CH11/EX11.4/ex11_4.sce
@@ -0,0 +1,10 @@
+clc;
+clear all;
+n0 = 1.76; // Refractive index of the ruby rod
+v0 = 4.3e14; //  Frequency in Hz
+deltav0 = 1.5e11; // The doppler broadening in Hz
+tsp = 4.3e-3; // Lifetime of the spontanous emission in seconds
+tphoton = 6e-9; // Lifetime of photon in seconds
+c = 3e8; // Velocity of air
+d = ((4*%pi^2*v0^2*n0^3*tsp*deltav0)/(c^3*tphoton)); //d = N2-N1 Difference between the excited and the ground state populations
+disp('m^-3',d,'The Difference between the excited and the ground state populations is')
diff --git a/3020/CH11/EX11.5/ex11_5.sce b/3020/CH11/EX11.5/ex11_5.sce
new file mode 100755
index 000000000..25490e521
--- /dev/null
+++ b/3020/CH11/EX11.5/ex11_5.sce
@@ -0,0 +1,12 @@
+clc;
+clear all;
+T = 300; // Temperature in kelvin
+c = 3e8;// Velocity of air
+h = 6.626e-34; // Plancks constant
+k = 1.38e-23; // Boltzmanns constant
+e = 1.602e-19; // Charge of an electron
+lambda = 5000e-10; // Wavelength of light in meters
+r = exp(((h*c)/(k*T*lambda))); // Temporary variable
+t = (1/(r-1)); //t =(Stimulated emission/Spontaneous emission) 
+disp('',t,'Ratio between stimulated emission and spontaneous emission')
+// Slight variation in answer as compared to textbook..checked in calculator alsoo..
diff --git a/3020/CH11/EX11.6/ex11_6.sce b/3020/CH11/EX11.6/ex11_6.sce
new file mode 100755
index 000000000..b37253aaa
--- /dev/null
+++ b/3020/CH11/EX11.6/ex11_6.sce
@@ -0,0 +1,11 @@
+clc;
+clear all;
+lambda = 6328e-10; // Wavelength of the laser beam
+p = 2.3e-3; // Energy emitted by the laser in Joule/second
+p1 = 2.3e-3*60; // Energy emitted by the laser in Joule/minute
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+v = c/lambda; // Frequency of photon emitted by laser beam
+E = h*v; // Energy of a photon
+N = p1/E; // The number of photons emitted
+disp('photons/minute',N,'The number of photons emitted')
diff --git a/3020/CH11/EX11.7/ex11_7.sce b/3020/CH11/EX11.7/ex11_7.sce
new file mode 100755
index 000000000..bcb4a5a65
--- /dev/null
+++ b/3020/CH11/EX11.7/ex11_7.sce
@@ -0,0 +1,10 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+lambda = 0.4e-6 ; // Wavelengh of cadmium sulphate crystal in meters
+E = (h*c)/lambda; // Energy of each photon emitted 
+a = 4e-6; // Area of photodetector in square meters
+I = 200; // Intensity of light in watts/square meters
+N = (I*a)/E;// The number of pairs generated per second
+disp('',N,'The number of pairs generated per second is')
diff --git a/3020/CH11/EX11.8/ex11_8.sce b/3020/CH11/EX11.8/ex11_8.sce
new file mode 100755
index 000000000..176267e4e
--- /dev/null
+++ b/3020/CH11/EX11.8/ex11_8.sce
@@ -0,0 +1,9 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+e = 1.609e-19; // Charge of an electron
+Eg = 2.8*e ; // Band gap of given semiconductor in joule
+lambda = ((h*c)/Eg)*1e-6; // Wavelength of emitted radiation 
+disp('um',lambda,'Wavelength of emitted radiation is')
+// Slight variation in the answer as compared to book... Checked in calculator... Book's mistake 
diff --git a/3020/CH11/EX11.9/ex11_9.sce b/3020/CH11/EX11.9/ex11_9.sce
new file mode 100755
index 000000000..0b61d3d56
--- /dev/null
+++ b/3020/CH11/EX11.9/ex11_9.sce
@@ -0,0 +1,8 @@
+clc;
+clear all;
+c = 3e8; // Velocity of light in air
+h = 6.626e-34 ; // Planck's constant
+e = 1.609e-19; // Charge of an electron
+Eg = 0.02*e ; // Ionization energy
+lambda = (h*c)/Eg; // Wavelength of emitted radiation 
+disp('m',lambda,'Wavelength of emitted radiation is')