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//Example 2_3
clc();
clear;
//To calculate the minimum number of lines
lemda=5890 //units in angstrom
lemda=5890*10^-8 //units in centimeters
dlemda=6*10^-8 //units in centimeters
k=2
width=2.5 //units in centimeters
n=(lemda/(k*dlemda))/width
printf("no of lines per cm is %.1f",n)
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