1 files changed, 19 insertions, 0 deletions
diff --git a/3869/CH1/EX1.21/Ex1_21.sce b/3869/CH1/EX1.21/Ex1_21.sce
new file mode 100644
index 000000000..f1e91c7b5
--- /dev/null
+++ b/3869/CH1/EX1.21/Ex1_21.sce
@@ -0,0 +1,19 @@
+clear
+//
+//
+//
+
+//Variable declaration
+D25=0.8       //diameter of 25th ring(cm)
+D5=0.3        //diameter of 5th ring(cm)
+p=25-5
+R=100         //radius of curvature(cm)
+
+//Calculation
+Nr=(D25**2)-(D5**2)    //numerator
+Dr=4*p*R               //denominator
+lamda=Nr/Dr            //wavelength of light used(cm)
+
+//Result
+printf("\n wavelength of light used is %0.3f  *10**-5 cm",lamda*10**5)
+printf("\n answer given in the book is wrong")