Projection screen and centrifugal pump: what they have in common

1. Step 1. Projection screen — is part of — Camera obscura. The surface on which the image is seen.
2. Step 2. Camera obscura — evolved into — Camera. A camera is a camera obscura with a light-sensitive layer.
3. Step 3. Camera — is part of — Bubble chamber. Photographing the tracks.
4. Step 4. Bubble chamber — is made of — Hydrogen. The working medium is superheated liquid hydrogen.
5. Step 5. Hydrogen — is used in — Liquid-propellant rocket engine. Hydrogen is an efficient fuel.
6. Step 6. Liquid-propellant rocket engine — has part — Centrifugal pump. Turbopumps deliver the propellant.

Open Evothings