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clc
//Given
t=40// length of tube in cm
lambda=5e-5// wavelength of incident light in cm
n=150// order of fringe
//Sample Problem 13 Page No. 52
printf("\n # Problem 13 # \n")
printf(" \n Standard formula used \n (mu – 1 )*t = n* lambda \n")
t=n*lambda/t+1
printf("\n Refractive index of oil film is %f .", t)
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