clc 
// Given that
d = 0.0001 // distance between two slits in meter
Beta = 0.005 // width of the fringes formed in meter
D = 1 // distance between slit and screen in meter
// Sample Problem 10 on page no. 1.43
printf("\n # PROBLEM 10 # \n")
lambda = (Beta * d) / D // calculation for wavelength of light = %e meter
printf("\n Standard formula used \n lambda = (Beta * d) / D.\n")
printf("\n Wavelength of light = %f A. ",lambda*1e10)