From b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b Mon Sep 17 00:00:00 2001
From: priyanka
Date: Wed, 24 Jun 2015 15:03:17 +0530
Subject: initial commit / add all books

---
 2708/CH1/EX1.21/ex_1_21.sce | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100755 2708/CH1/EX1.21/ex_1_21.sce

(limited to '2708/CH1/EX1.21/ex_1_21.sce')

diff --git a/2708/CH1/EX1.21/ex_1_21.sce b/2708/CH1/EX1.21/ex_1_21.sce
new file mode 100755
index 000000000..b7d5084b6
--- /dev/null
+++ b/2708/CH1/EX1.21/ex_1_21.sce
@@ -0,0 +1,11 @@
+//Example 1.21 // radius of lens
+clc;
+clear;
+//given data :
+w=5890D-10;//wavelength used in m
+d=.01;//diameter of dark ring in m
+r=%pi/6;//angle that light passes in radian
+n=3;// order of ring
+u=1;// refractive index of medium  between lens  and plate
+R=u*(d^2)*cos(r)/(4*n*w);// radius of lens in m
+disp(R,"radius of lens in m")
-- 
cgit