4 ms·
The hole in the CD is used to secure it. FWIW, many CDs are also very good mirrors. I've also used commercial pressings without extensive paint to look at ecli
by gwbas1c 6y ago
The hole in the CD is used to secure it.
FWIW, many CDs are also very good mirrors. I've also used commercial pressings without extensive paint to look at eclipses.
- CydeWeys 6y agoThe hole isn't necessary. Here's a working solution with a compact: https://i.imgur.com/OF29Ci3.jpg https://i.imgur.com/OF29Ci3.jpg