16 files changed, 207 insertions, 0 deletions
diff --git a/3769/CH19/EX19.1/Ex19_1.sce b/3769/CH19/EX19.1/Ex19_1.sce
new file mode 100644
index 000000000..5d2f30967
--- /dev/null
+++ b/3769/CH19/EX19.1/Ex19_1.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+v=-75.0
+u=0
+
+//Calculation
+f=v
+P=100/f
+
+//Result
+printf("\n Focal length is %0.3f  cm", f)
+printf("\n Power of the lens is %0.2f  D",P)
diff --git a/3769/CH19/EX19.10/Ex19_10.sce b/3769/CH19/EX19.10/Ex19_10.sce
new file mode 100644
index 000000000..afaeeb0cb
--- /dev/null
+++ b/3769/CH19/EX19.10/Ex19_10.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+f=4.80            //cm
+a=1.20
+v=-24.0            //cm
+
+//Calculation
+D=f/(a-1)
+u=1/((1/v)-1/f)
+
+//Result
+printf("\n (i) The least distance of distinct vision is %0.3f  cm",D)
+printf("\n (ii) Distance from the lens is %0.3f  cm",-u)
diff --git a/3769/CH19/EX19.11/Ex19_11.sce b/3769/CH19/EX19.11/Ex19_11.sce
new file mode 100644
index 000000000..3a5887b9e
--- /dev/null
+++ b/3769/CH19/EX19.11/Ex19_11.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+v0=15.0                      //cm
+f0=3.0                        //cm
+D=25
+fe=9
+
+//Calculation
+u0=1/((1/v0)-1/f0)
+M=-(v0*D)/(u0*fe)
+
+//Result
+printf("\n Magnifying power is %0.1f  ",M)
diff --git a/3769/CH19/EX19.14/Ex19_14.sce b/3769/CH19/EX19.14/Ex19_14.sce
new file mode 100644
index 000000000..003b84bb6
--- /dev/null
+++ b/3769/CH19/EX19.14/Ex19_14.sce
@@ -0,0 +1,19 @@
+clear
+//Given
+f0=1.0
+u0=-1.1                            //cm
+D=25
+fe=5.0
+ve=25.0
+
+//Calculation
+v0=1/((1/f0)+1/u0)
+d=v0+fe
+M=-(v0*D)/(u0*fe)
+ue=-1/((1/ve)+1/fe)
+D1=v0-ue
+M1=-(v0/u0)*(1+(D/fe))
+
+//Result
+printf("\n (i) Distance between the lenses when image is at infinity %0.3f  cm", d)
+printf("\n (ii) Distance between the lenses when image is at distinct vision %0.2f  cm",D1)
diff --git a/3769/CH19/EX19.16/Ex19_16.sce b/3769/CH19/EX19.16/Ex19_16.sce
new file mode 100644
index 000000000..0fc93b8bf
--- /dev/null
+++ b/3769/CH19/EX19.16/Ex19_16.sce
@@ -0,0 +1,10 @@
+clear
+//Given
+fe=3
+M=4
+
+//Calculation
+f0=fe*M
+
+//Result
+printf("\n Focal length of the lenses is %0.3f cm and %0.3f cm",f0,fe)
diff --git a/3769/CH19/EX19.17/Ex19_17.sce b/3769/CH19/EX19.17/Ex19_17.sce
new file mode 100644
index 000000000..d4c1cb5f5
--- /dev/null
+++ b/3769/CH19/EX19.17/Ex19_17.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+u0=-200.0                          //cm
+f0=30.0                            //cm
+fe=3
+
+//Calculation
+v0=1/((1/f0)+1/u0)
+a=v0+fe
+
+//Result
+printf("\n Separation between the objective and eyepiece is %0.1f  cm",a)
diff --git a/3769/CH19/EX19.18/Ex19_18.sce b/3769/CH19/EX19.18/Ex19_18.sce
new file mode 100644
index 000000000..ac6d5335b
--- /dev/null
+++ b/3769/CH19/EX19.18/Ex19_18.sce
@@ -0,0 +1,16 @@
+clear
+//Given
+ve=24.0
+fe=8.0
+f0=250.0
+a=10
+
+//Calculation
+ue=1/((1/ve)-(1/fe))
+D=f0-ue
+d=a/2.0
+A=d/f0
+
+//Result
+printf("\n (i) Distance between objective and eyepiece is %0.3f  cm", D)
+printf("\n (ii) Angle subtended by the sun at the objective is %0.3f  rad",A)
diff --git a/3769/CH19/EX19.19/Ex19_19.sce b/3769/CH19/EX19.19/Ex19_19.sce
new file mode 100644
index 000000000..33b016880
--- /dev/null
+++ b/3769/CH19/EX19.19/Ex19_19.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+M=-20
+R=-120
+
+//Calculation
+f0=R/2.0
+fe=f0/M
+
+//Result
+printf("\n Focal length of eyepiece is %0.3f  cm", fe)
diff --git a/3769/CH19/EX19.2/Ex19_2.sce b/3769/CH19/EX19.2/Ex19_2.sce
new file mode 100644
index 000000000..9088b85ea
--- /dev/null
+++ b/3769/CH19/EX19.2/Ex19_2.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+u=-25.0                         //cm
+v=-150.0                       //cm
+
+//Calculation
+f=1/((1/v)-1/u)
+P=100/f
+
+//Result
+printf("\n Focal length of the lens is %0.3f  cm", f)
+printf("\n Power of the lens is %0.2f  D",P)
diff --git a/3769/CH19/EX19.21/Ex19_21.sce b/3769/CH19/EX19.21/Ex19_21.sce
new file mode 100644
index 000000000..8b5ae5fcd
--- /dev/null
+++ b/3769/CH19/EX19.21/Ex19_21.sce
@@ -0,0 +1,17 @@
+clear
+//Given
+u0=-200.0                        //cm
+fa=50.0                          //cm
+ve=-25.0                           //cm
+fe=5.0                            //cm
+
+//Calculation
+v0=1/((1/fa)+1/u0)
+M0=v0/u0
+ue=1/((1/ve)-1/fe)
+Me=ve/ue
+D=v0-ue
+M=M0*Me
+
+//Result
+printf("\n (i) Saparation between the objective and eyepiece is %0.2f  cm",D)
diff --git a/3769/CH19/EX19.3/Ex19_3.sce b/3769/CH19/EX19.3/Ex19_3.sce
new file mode 100644
index 000000000..7cf6928a6
--- /dev/null
+++ b/3769/CH19/EX19.3/Ex19_3.sce
@@ -0,0 +1,10 @@
+clear
+//Given
+u=-25.0                           //cm
+v=-50.0                           //cm
+
+//Calculation
+f=1/((1/v)-1/u)
+
+//Result
+printf("\n Focal length is %0.3f  cm", f)
diff --git a/3769/CH19/EX19.4/Ex19_4.sce b/3769/CH19/EX19.4/Ex19_4.sce
new file mode 100644
index 000000000..3e0565e7d
--- /dev/null
+++ b/3769/CH19/EX19.4/Ex19_4.sce
@@ -0,0 +1,12 @@
+clear
+//Given
+v=-80.0                      //cm
+
+//Calculation
+f=v
+P=100/f
+
+//Result
+printf("\n (a) Power of the lens is %0.3f  D", P)
+printf("\n (b) No the corrective lens is concave and it reduces the size of the image. Because it bring the object at the far point of the eye")
+printf("\n (c) The myopic person may have a normal near point. He must keep the book at a distance greater than 25 cm.")
diff --git a/3769/CH19/EX19.5/Ex19_5.sce b/3769/CH19/EX19.5/Ex19_5.sce
new file mode 100644
index 000000000..a4d222fb6
--- /dev/null
+++ b/3769/CH19/EX19.5/Ex19_5.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+v=-75.0                       //cm
+u=-25.0                       //cm
+
+//Calculation
+f=1/((1/v)-1/u)
+P=100/f
+
+//Result
+printf("\n (a) Power of the lens is %0.2f  D",P)
+printf("\n (b) The corrective lens produce a virtual imageof an object at 25 cm. The angular size of this image is the same as the object")
+printf("\n (c) A hypermetropic eye may have normal far point.Hence the person prefers not to use the spectacles for distant object")
diff --git a/3769/CH19/EX19.6/Ex19_6.sce b/3769/CH19/EX19.6/Ex19_6.sce
new file mode 100644
index 000000000..f43a29f24
--- /dev/null
+++ b/3769/CH19/EX19.6/Ex19_6.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+P=-0.8                 //d
+v1=-15.0              //cm 
+v2=-100.0              //cm
+
+//Calculation
+f=100/P
+u1=1/((1/v1)-1/f)
+u2=1/((1/v2)-(1/f))
+
+//Result
+printf("\n The person can see objects lying between %0.0f cm and %0.3f cm",-u1,-u2)
diff --git a/3769/CH19/EX19.7/Ex19_7.sce b/3769/CH19/EX19.7/Ex19_7.sce
new file mode 100644
index 000000000..3c431a3d6
--- /dev/null
+++ b/3769/CH19/EX19.7/Ex19_7.sce
@@ -0,0 +1,11 @@
+clear
+//Given
+u=-25              //cm
+p=3.0
+
+//Calculation
+f=100/p
+v=1/((1/f)+1/u)
+
+//Result
+printf("\n Distance is %0.0f  m",v)
diff --git a/3769/CH19/EX19.8/Ex19_8.sce b/3769/CH19/EX19.8/Ex19_8.sce
new file mode 100644
index 000000000..bd0c37ffd
--- /dev/null
+++ b/3769/CH19/EX19.8/Ex19_8.sce
@@ -0,0 +1,13 @@
+clear
+//Given
+u=-25.0              //cm
+v=-90.0              //cm
+
+//calculation
+f=1/((1/v)-1/u)
+f1=(1/2.0)*10**2
+u=1/((1/v)-1/f1)
+
+//Result
+printf("\n (i) focal length is %0.1f  cm",f)
+printf("\n (ii) Distance is %0.1f  cm",u)