From 2facdf6a316829750773dda05b72fbcccd1b139c Mon Sep 17 00:00:00 2001
From: Eugeniy Mikhailov <evgmik@gmail.com>
Date: Fri, 5 Sep 2014 08:54:12 -0400
Subject: typo fix, thanks Michael

---
 interferometry.tex | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'interferometry.tex')

diff --git a/interferometry.tex b/interferometry.tex
index ef14794..02c1b3d 100644
--- a/interferometry.tex
+++ b/interferometry.tex
@@ -56,7 +56,7 @@ In \textbf{Fabry-Perot configuration} the input light field bounces between two
 A Fabry-Perot interferometer consists of two parallel glass plates, flat to better than 1/4 of an optical
 wavelength $\lambda$, and coated on the inner surfaces with a partially transmitting metallic layer. Such
 two-mirror arrangement is normally called an {\it optical cavity}. The light in a cavity by definition bounces
-back and forth many time before escaping; the idea of such a cavity is crucial for the construction of a laser.
+back and forth many times before escaping; the idea of such a cavity is crucial for the construction of a laser.
 Any light transmitted through such cavity is a product of interference between beams transmitted at each bounce
 as diagrammed in Figure~\ref{fpfig1}. When the incident ray arrives at interface point $A$, a fraction $t$ is
 transmitted and the remaining fraction $r$  is reflected, such that $t + r = 1$ ( this assumes no light is lost
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