Interferometer and heron’s aeolipile: what they have in common

1. Step 1. Interferometer — has part — Mirror. Mirrors.
2. Step 2. Mirror — is part of — Solar concentrator. Mirrors concentrate the light.
3. Step 3. Solar concentrator — has part — Steam turbine. Heated steam turns a turbine.
4. Step 4. Steam turbine — is a kind of — Turbine. A kind of turbine.
5. Step 5. Turbine — evolved from — Heron’s aeolipile. The aeolipile is the oldest ancestor of the steam turbine.

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