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+//Introduction to Fiber Optics by A. Ghatak and K. Thyagarajan, Cambridge, New Delhi, 1999
+//Example 2.6
+//OS=Windows XP sp3
+//Scilab version 5.5.2
+clc;
+clear;
+//given
+n1=1.46;//refractive index of doped silica
+n2=1.45;//refractive index of pure silica
+thetac=asin(n2/n1);//critical angle for interface between doped silica and pure silica in radians
+mprintf("Critical angle for interface between doped silica and pure silica=%.1f degrees",thetac*180/%pi);//multiplying by 180/pi to convert radians to degrees