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

---
 446/CH4/EX4.10/4_10.txt | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
 create mode 100755 446/CH4/EX4.10/4_10.txt

(limited to '446/CH4/EX4.10/4_10.txt')

diff --git a/446/CH4/EX4.10/4_10.txt b/446/CH4/EX4.10/4_10.txt
new file mode 100755
index 000000000..0e7039345
--- /dev/null
+++ b/446/CH4/EX4.10/4_10.txt
@@ -0,0 +1,16 @@
+ Ex-4.10   
+ Group velocity is found out from Eq. 4.18.
+
+ Since k=2*pi/w ; Vphase= w/k 
+
+ w/k = sqrt(g/k)
+ 
+ w=sqrt(g*k)
+
+differetiating on both sides
+
+dw=1/2 * sqrt(g) * k^-1/2 * dk
+
+ dw= 1/2 * sqrt(g/k)
+ 
+Hence Vgroup= Vphase/2 
\ No newline at end of file
-- 
cgit