(∫_(430   nm)^(530   nm))f(s 1)dx-(∫_(430   nm)^(530   nm))f(s 2)dx=(Subscript[Δ, reflectance]^(without   calcium)),
(∫_(430   nm)^(530   nm))f(s 1)dx-(∫_(430   nm)^(530   nm))f(s 2)dx=(Subscript[Δ, reflectance]^(with   calcium)),
((Subscript[Δ, reflectance]^(without   calcium))/(Subscript[Δ, reflectance]^(with   calcium)))=1.84,