where “1” and “2” denote two interacting bodies inside medium “3”, A is the Hamaker constant, ve is the medium absorption frequency (for H2O, ve = 3 x 1015 s-1), ε is the dielectric constant that indicates the extent to which a material concentrates electric flux, n is the refractive index, K is the Boltzamnn constant, h is the Plank constant and T is the absolute temperature [33].