Task·Codex
Gather Ores Galena
Stages
| Rank | Description | Requirement | Rewards |
|---|---|---|---|
| 0 | Mine more to unlock rewards | total_gathered_galena_node 1,000 | |
| 1 | Mine more to unlock rewards | total_gathered_galena_node 10,000 | |
| 2 | Mine more to unlock rewards | total_gathered_galena_node 100,000 |
Codex entry
These stages unlock codex entries for
Galena node.
- Entry 1
Early twentieth-century crystal radio sets used galena crystals as semiconductor detectors, with a thin "cat's whisker" wire rectifying incoming radio waves into audible signals.
- Entry 2
Ancient Egyptians ground galena into the black eye cosmetic kohl, worn by all social classes for beauty, sun protection, and religious significance since at least the predynastic Badarian period.
- Entry 3
Galena is a natural semiconductor with a band gap of about 0.4 eV. Early 1900s crystal radio sets used galena crystals as point-contact diode detectors, making it one of humanity's first semiconductor devices.
Group: gather_ores_galena


