//Given that
l = 550*10^-9  //in meter
n2 = 1.60
n1 = 1.00
t = 2.6*10^-6  //in meter

//Sample Problem 36-1a
printf("**Sample Problem 36-1a**\n")
deltaPHI = t/l*(n2 - n1)*360
printf("The phase difference is equal to %1.2fdegrees\n", deltaPHI)

//Sample Problem 36-1b
printf("\n**Sample Problem 36-1b**\n")
printf("The interference produced would be constructive")