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clear
//
//
//
//Variable declaration
i=60*%pi/180 //angle of incidence(radian)
mew=1.33 //refractive index
t=1.5*10**-6 //thickness(m)
lamda=5*10**-7 //wavelength(m)
//Calculation
r=(180/%pi)*asin(sin(i)/mew) //angle of reflection(degrees)
r=(r)*%pi/180 //angle of reflection(degrees)
n=2*mew*t*cos(r)/lamda //order of interference
//Result
printf("\n order of interference is %0.3f ",n)
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