dethmetaljeff

joined 2 years ago
[โ€“] dethmetaljeff@lemmy.ml 17 points 1 week ago

It's a phase change alloy, when writing a high powered laser is used to melt the alloy, when it cools quickly it becomes opaque. When erasing, a lower powered laser heats up the disc and returns it to its transparent state. A reading laser isn't powerful enough to change the phases at all. So, you have the idea right... just no magnets involved.

[โ€“] dethmetaljeff@lemmy.ml 16 points 1 week ago (4 children)

I recently used Avis, they were totally cromulent.