Total internal reflection and centrifugal pump: what they have in common

1. Step 1. Total internal reflection — is used in — Optical fibre. Light is kept inside the core.
2. Step 2. Optical fibre — is used in — Fibre-optic sensor. A fibre.
3. Step 3. Fibre-optic sensor — is made of — Silica (sand). The fibre is silica glass.
4. Step 4. Silica (sand) — is material for — Space Shuttle. The heat-shield tiles are silica fibre.
5. Step 5. Space Shuttle — has part — Liquid-propellant rocket engine. Hydrogen-fuelled main engines.
6. Step 6. Liquid-propellant rocket engine — has part — Centrifugal pump. Turbopumps deliver the propellant.

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