Doppler radar and tank: what they have in common

1. Step 1. Doppler radar — has part — Dish antenna. A parabolic antenna.
2. Step 2. Dish antenna — uses — Reflection of light. A paraboloid focuses the waves.
3. Step 3. Reflection of light — is used in — Periscope. Reflection.
4. Step 4. Periscope — is part of — Tank. Observation devices.

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