Kontaktlinse und electrical telegraph: was sie gemeinsam haben

1. Schritt 1. Kontaktlinse — entwickelte sich aus — Brille. A lens right on the eye.
2. Schritt 2. Brille — entwickelte sich zu — Telescope. The first telescopes were assembled by spectacle makers.
3. Schritt 3. Telescope — wird verwendet in — Optical telegraph. Signals were read through a telescope.
4. Schritt 4. Optical telegraph — entwickelte sich zu — Electrical telegraph. The electrical telegraph replaced semaphore lines.

Evothings öffnen