Optical disc (CD/DVD) und tunnelling shield: was sie gemeinsam haben

1. Schritt 1. Optical disc (CD/DVD) — nutzt — Laser diode. Read by a laser.
2. Schritt 2. Laser diode — nutzt — P–n junction. A p–n junction emits the light.
3. Schritt 3. P–n junction — wird verwendet in — IGBT. A transistor structure with p–n junctions.
4. Schritt 4. IGBT — ist Teil von — Elektrolokomotive. Traction converters.
5. Schritt 5. Elektrolokomotive — wird verwendet in — Metro. The first lines were steam-operated; electric trains since 1890.
6. Schritt 6. Metro — nutzt — Tunnelling shield. Metro tunnels were built with shields.

Evothings öffnen