Laser beam clock tells time with mirrors
The bad news is, as cool at it would be to have, the Reflectius (is that a spell in Harry Potter?) is just a concept. And I’m entirely sure that it will ever be made. Lasers are notoriously sensitive about heat, and having a laser on all the time just to be used a clock just isn’t practical. Of course, when was the last time you saw a product from Art Lebedev that was?
[via Endgadget]