Silver halide and router: what they have in common

1. Step 1. Silver halide — is made of — Silver. A silver salt.
2. Step 2. Silver — uses — Electrical conduction. The best conductor.
3. Step 3. Electrical conduction — is used in — Antenna. Current in a conductor radiates a wave.
4. Step 4. Antenna — is part of — Router. Antennas.

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