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clc;clear;
//Example 7.3
//Newton's ring experiment- calculation of refractive index
//given values
D1=1.5;//diametre (in cm)of tenth dark ring in air
D2=1.27;//diametre (in cm)of tenth dark ring in liquid
//calculation
n=D1^2/D2^2;
disp(n,'refractive index of liquid is');
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