Dispersion of light and internal combustion engine: what they have in common

1. Step 1. Dispersion of light — is used in — Prism. Different colours are refracted differently.
2. Step 2. Prism — is part of — Spectroscope. A prism.
3. Step 3. Spectroscope — is used in — Helium. Helium was discovered by spectroscopy in the solar spectrum.
4. Step 4. Helium — is used in — Airship. After the Hindenburg — helium.
5. Step 5. Airship — has part — Internal combustion engine. Internal combustion engines.

Open Evothings