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//Example number 1.3, Page number 1.36
clc;clear;close
//Variable declaration
w=0.02 // in m
n=1
lamda=6.56*10**-7 // in m
theta=(18+(14/60))*%pi/180 // in radian
//Calculation
N=(w*sin(theta))/(n*lamda) // no. of lines
//Result
printf("Total number of lines n the grating=%d",round(N))
//Answer varies due to rounding of number"
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