De quoi est fait optical disc (CD/DVD)
Data is read by a laser.
- Laser diode — utilise. Read by a laser.
- Reflection of light — utilise. Reflection from the pits.
- Wave interference — utilise. The pits cancel the reflected beam by interference — that is how zeros and ones are read.
- Plastic — est fait de. The disc is polycarbonate.
- Aluminium — est fait de. The reflective layer is aluminium.