De quoi est fait lampe à arc
Light from an electric arc between carbons (Petrov, Davy, c. 1802); the “Yablochkov candle” (1876) made it street lighting.
- Carbon rods — a pour partie. An arc burns between them.
- Arc gap regulator — a pour partie. It brings the electrodes together as they burn away.
- Arc électrique — utilise. An arc.
- Graphite — est fait de. Carbon electrodes.