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diff --git a/761/CH14/EX14.19/14_19.sce b/761/CH14/EX14.19/14_19.sce
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+clc;
+//page no 503
+//prob no. 14.19
+//2 adjacent minima on slotted are 23cm apart with velo factor=95%
+L=23*10^-2;vf=0.95;c=3*10^8;//Velo. of light in m/s
+//Determination of wavelength
+wav=2*L;//Minima are seperated by one-half wavelength
+disp('cm',wav*100,'The wavelength is');
+//Determination of freq.
+f=(vf*c)/wav;//vp=vf*c
+disp('MHz',f/10^6,'The freq is'); 
+\ No newline at end of file