How can I tell the difference between a bluray disc and a dvd disc?
How can I tell the difference between a bluray disc and a dvd disc?
user
A bluray disc has the same dimensions as a dvd disc, but is actually a double-sided dvd disc.  The bluray disc is readable in a bluray player, but not in a dvd player.
assistant
Are there any visible differences between the two?
user
A bluray disc looks like a dvd disc, but is thicker and heavier.
assistant
Oh, I didn't think about thickness.  You're right.
user