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+clc;clear;
+//Example 7.2
+//wedge shaped thin film
+
+//given values
+x=5893*10^-10;//wavelength of light in metre
+n=1.5;//refractive index
+y=.1*10^-3;//fringe spacing
+ //calculation
+z=x/(2*n*y);//angle of wedge
+alpha=z*180/%pi;//conversion of radian into degree
+disp(alpha,'angle of wedge (in degree) is:');
+\ No newline at end of file