I skimmed your post the first time and missed that it contained a quiz! \:\) Let's see...

A disc with 6cm radius has a 25GB capacity. With a little math, that works out to be a data density of about .221GB per unit of area. A laserdisc-sized Blu-Ray disc would have a 15cm radius. Multiplying it's area by this density factor yields a capacity of approximately 156.25GB, or about 6 times the capacity of the normal disc.

If I were being really thorough, I would have subtracted out the area of the hubs in my calculations (since no data can be written there), but I'll leave that to some other anal mathematician. \:\)

Last edited by pmbuko; 01/19/08 09:25 AM. Reason: fixed some words