Nuclear fission and electrical telegraph: what they have in common

1. Step 1. Nuclear fission — evolved from — Radioactivity. Studying radioactive decay led to the discovery of fission.
2. Step 2. Radioactivity — is used in — Smoke detector. Ionization detectors use americium.
3. Step 3. Smoke detector — is used in — Burglar alarm. A security system often includes smoke detectors too.
4. Step 4. Burglar alarm — has part — Electromagnet. A bell.
5. Step 5. Electromagnet — is part of — Electrical telegraph. Morse’s receiver.

Open Evothings