yes indeed....blue light "spreads out" less than other colours since it has a smaller wavelength... in the blu ray they pass this through a smaller aperture so it is better focused (they've essentially cut out only the centre of the beam which was going in a straighter line in the first place..)...but you have less light to work with so, the data track is nearer the surface than in hd-dvd meaning they had to develop special coatings which protect the surface from scratches, repels grease etc (needs to be much more durable than on a dvd since it needs to be a much thinner layer, but they have...so blu ray is better)... and yeah..it goes in a spiral adam