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//Ex1_6
//given
//page no 12
clc;
clear;
disp('Solution (i) is ');
l=720; //wavelength in nm
n=1.5; //refractive index
lm=l/n;
disp('nm',lm,'Wavelenth is'); //result
disp('Solution (ii) is ');
c=3*10^8; //in m/s speed of light
u=c/n;
disp('m/s',u,'Velocity is'); //result
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