Fluorescent viewing screen and syringe: what they have in common

1. Step 1. Fluorescent viewing screen — is part of — Electron microscope. Or an image detector.
2. Step 2. Electron microscope — has part — Vacuum pump. A vacuum in the column.
3. Step 3. Vacuum pump — evolved from — Piston pump. Guericke adapted the piston pump to pump out air.
4. Step 4. Piston pump — works like — Syringe. A syringe is a hand-operated piston pump.

Open Evothings