Electromagnetic lenses and joystick: what they have in common

1. Step 1. Electromagnetic lenses — is part of — Electron microscope. They focus the beam.
2. Step 2. Electron microscope — uses — Electromagnet. Magnetic lenses.
3. Step 3. Electromagnet — uses — Electromagnetism. Current creates a magnetic field.
4. Step 4. Electromagnetism — is used in — Vibration motor. Like any electric motor, it turns thanks to electromagnetism.
5. Step 5. Vibration motor — is part of — Gamepad. Vibration.
6. Step 6. Gamepad — evolved from — Joystick. A game controller.

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