Persistence of vision and gas lamp: what they have in common

1. Step 1. Persistence of vision — is used in — Cinema. The illusion of motion.
2. Step 2. Cinema — uses — Cinématographe. Cinema began with the cinématographe.
3. Step 3. Cinématographe — uses — Photographic film. Perforated film.
4. Step 4. Photographic film — is used in — Film projector. It shows film.
5. Step 5. Film projector — has part — Incandescent light bulb. The light source (formerly an arc).
6. Step 6. Incandescent light bulb — evolved from — Gas lamp. Electricity displaced gas lighting.

Open Evothings