5 files changed, 17 insertions, 16 deletions
diff --git a/3875/CH10/EX10.13/10_13.sce b/3875/CH10/EX10.13/10_13.sce
index 366e8ace0..d926d115f 100644
--- a/3875/CH10/EX10.13/10_13.sce
+++ b/3875/CH10/EX10.13/10_13.sce
@@ -8,19 +8,20 @@ W=4.2 //work function in Joule
 c=3*10^8 //velocity of light in m/s
 
 //calculation 
-E=(h*v)/(lambda)//energy in J
+E=(h*c)/(lambda)//energy in J
 E_v=E/e //energy in eV
 
 //case (1)
+//(a)
 E_k=E_v-W
-mprintf("\nThe kinetic energy of the fastest electrons is = %d eV\n",E_k)
+mprintf("The kinetic energy of the fastest electrons is = %d eV\n",E_k)
+
+//(b)
+mprintf("The kinetic energy of slowest electrons is zero. As the emitted electrons have all possible energies from 0 to certain maximun value is E_k = %d eV \n",E_k)
 
 //case(2)
-mprintf("\nThe kinetic energy of slowest electrons is zero.As the emitted electrons have all possible energies from 0 to certain maximun value is E_k\n")
+mprintf("If V_s is the stopping potential then E_k=e*V_s.Since the electrons have a maximum kinetic energy of %d eV,the stopping potential is also E_k = %d eV \n",E_k,E_k)
 
 //case(3)
-mprintf("If V_s is the stopping potential then E_k=e*V_s.Since the electrons have a maximum kinetoc energy of 2eV,the stopping potential is 2V.\n")
-
-//case(4)
 lambda_0=(h*c)/(W*e)
-mprintf("The cut off wavelength for aluminium is %1.2e m",lambda_0) //The answer provided in the textbook is wrong.
+mprintf("The cut off wavelength for aluminium is %1.1e m",lambda_0)
diff --git a/3875/CH10/EX10.15/10_15.sce b/3875/CH10/EX10.15/10_15.sce
index e871bae41..32babe3a3 100644
--- a/3875/CH10/EX10.15/10_15.sce
+++ b/3875/CH10/EX10.15/10_15.sce
@@ -1,14 +1,14 @@
 clc;
 clear;
-lambda1=400 //wavelength in nm
-lambda2=300 //wavelength in nm
+lambda1=400*10^-9 //wavelength in m
+lambda2=300*10^-9 //wavelength in m
 V1=0.82 //stopping potential in V
 V2=1.85 //stopping potential in V
 c=3*10^8 //velocity of light in m/s
 e=1.6*10^-19 //charge in C
 
 //calculation
-h=(e*(V1-V2)*(lambda1*10^-9)*(lambda2*10^-9))/(c*(lambda2-lambda1)*10^-9)
+h=(e*(V1-V2)*(lambda1)*(lambda2))/(c*(lambda2-lambda1))
 
 mprintf("\nThe Plancks constant is = %1.3e J-s\n",h)
 mprintf("The photoelectric current will not be obtained as the stopping potential does not depend on the intensity of light")
diff --git a/3875/CH10/EX10.31/10_31.sce b/3875/CH10/EX10.31/10_31.sce
index cfeff01cb..a3e2a4cd5 100644
--- a/3875/CH10/EX10.31/10_31.sce
+++ b/3875/CH10/EX10.31/10_31.sce
@@ -8,4 +8,4 @@ m=1.675*10^-27 //mass in kg
 p_min=h/(4*%pi*delta_x) //minimum momentum in kg-m/s
 E_min=((p_min)^2/(2*m))
 
-mprintf("The minimum kinetic energy of the nucleon is = %1.2e J or 0.33*10^-15 J",E_min)
+mprintf("The minimum kinetic energy of the nucleon is = %0.2e J",E_min)
diff --git a/3875/CH10/EX10.9/10_9.sce b/3875/CH10/EX10.9/10_9.sce
index 04a390b8f..283855b74 100644
--- a/3875/CH10/EX10.9/10_9.sce
+++ b/3875/CH10/EX10.9/10_9.sce
@@ -13,12 +13,12 @@ d_lambda2=1*10^-9 //range of wavelength in m
 //case (a) when the range of wavelength is between 1-1.1 mm
 E=exp((h*c)/(lambda1*k_B*T)) //calculating the exponential term of the eqn
 U_lambda1=((8*%pi*h*c*d_lambda1)/(lambda1^5*(E-1)))
-mprintf("The energy density is = %1.2e J/m^3.\n",U_lambda1)
+mprintf("The energy density for wavelength in range 1-1.1 mm is = %1.2e J/m^3.\n",U_lambda1)
 
 //case (b) when the range of wavelength is between 100-101 nm
 E1=exp((h*c)/(lambda2*k_B*T)) //calculating the exponential term of the eqn
 U_lambda2=((8*%pi*h*c*d_lambda2)/(lambda2^5*(E1-1)))
-mprintf("The energy density is = %1.2e J/m^3.",U_lambda2)
+mprintf("The energy density for wavelength in range 100-101 mm is = %1.2e J/m^3.",U_lambda2)
 //The answer provided in the textbook is wrong.
 
 mprintf("\nThus for shorter wavelengths the energy densities predicted by Rayleigh-Jeans law and Planks law are considerably different while for longer wavelengths the energy densites predicted are same.")
diff --git a/3875/CH10/EX10.9/10_9.txt b/3875/CH10/EX10.9/10_9.txt
index dd4ecf59d..bbdfa1efd 100644
--- a/3875/CH10/EX10.9/10_9.txt
+++ b/3875/CH10/EX10.9/10_9.txt
@@ -1,3 +1,3 @@
-The energy density is = 3.44e-11 J/m^3.
-The energy density is = 1.27e-60 J/m^3.
-Thus for shorter wavelengths the energy densities predicted by Rayleigh-Jeans law and Planks law are considerably different while for longer wavelengths the energy densites predicted are same.
-\ No newline at end of file
+The energy density for wavelength in range 1-1.1 mm is = 3.44e-11 J/m^3.
+The energy density for wavelength in range 100-101 mm is = 1.27e-60 J/m^3.
+Thus for shorter wavelengths the energy densities predicted by Rayleigh-Jeans law and Planks law are considerably different while for longer wavelengths the energy densites predicted are same.s
+\ No newline at end of file