Total internal reflection and heat 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 part of — Internet. The backbones are optical fibre.
3. Step 3. Internet — is used in — Cloud computing. Access over the Internet.
4. Step 4. Cloud computing — uses — Data centre. The cloud is data centres.
5. Step 5. Data centre — has part — Air conditioner. Cooling.
6. Step 6. Air conditioner — uses — Heat pump. An air conditioner is a heat pump that carries heat out of the room.

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