Arc gap regulator and particle accelerator: what they have in common

1. Step 1. Arc gap regulator — is part of — Arc lamp. It brings the electrodes together as they burn away.
2. Step 2. Arc lamp — is part of — Street light. The first electric street lights were arc lamps (the “Yablochkov candle”, 1878).
3. Step 3. Street light — evolved from — Gas lamp. Gas lamps.
4. Step 4. Gas lamp — evolved into — Incandescent light bulb. Electricity displaced gas lighting.
5. Step 5. Incandescent light bulb — uses — Vacuum. The bulb was evacuated so the filament would not burn out.
6. Step 6. Vacuum — is used in — Particle accelerator. A vacuum chamber.

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