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//Example 1_46
clc();
clear;
//To find the least thickness of the glass plate
lemda=6000 //units in angstroam
lemda=6000*10^-8 //units in cm
u=1.5
r=50 //units in degree
n=1 //n=1 for least thickness
t=(n*lemda)/(2*u*cos(r*%pi/180))
printf("Least Thickness of the glass plate is %.7f cm",t)
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