Coulomb’s law and internet: what they have in common

1. Step 1. Coulomb’s law — uses — Static electricity. Charges.
2. Step 2. Static electricity — is used in — Xerography. Toner sticks to a charged drum.
3. Step 3. Xerography — is used in — Laser printer. The principle of xerography.
4. Step 4. Laser printer — has part — Laser diode. A laser draws the image on the drum.
5. Step 5. Laser diode — is used in — Optical fibre. The source is a laser.
6. Step 6. Optical fibre — is part of — Internet. The backbones are optical fibre.

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