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

---
 2780/CH3/EX3.20/Ex3_20.sce | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100755 2780/CH3/EX3.20/Ex3_20.sce

(limited to '2780/CH3/EX3.20')

diff --git a/2780/CH3/EX3.20/Ex3_20.sce b/2780/CH3/EX3.20/Ex3_20.sce
new file mode 100755
index 000000000..d5aa37d94
--- /dev/null
+++ b/2780/CH3/EX3.20/Ex3_20.sce
@@ -0,0 +1,12 @@
+clc
+//to calculate grating element
+//grating equation for principal maxima is given by (e+d)*sintheta=n*lambda
+//let nth order spectrum for yellow line (lambda=6000 angstrom) coincide with (n+1)th order spectrum for blue line (lambda=4800 angstrom) 
+//(e+d)*sintheta=n*6000*10^-8..eq(1)
+//(e+d)*sintheta=(n+1)*4800*10^-8.....eq(2)
+//from eq(1) and eq(2),we get n=4
+n=4
+lambda=6000*10^-8      //wavelength in cm
+sintheta=3/4   
+eplusd=n*lambda/sintheta
+disp("grating element is eplusd="+string(eplusd)+"cm")
-- 
cgit