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+//Introduction to Fiber Optics by A. Ghatak and K. Thyagarajan, Cambridge, New Delhi, 1999
+//Example 21.4
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+//given
+va=5.96e3;//Velocity of the acoustic wave
+Lb=2e-3;//Beat length in m
+
+f=va/Lb;//Acoustic frequency in Hz for Theta=0 degrees
+mprintf("\n f=%.2f MHz",f/1e6);//Division by 10^6 to convert into MHz