Retroreflector and chisel: what they have in common

1. Step 1. Retroreflector — uses — Reflection of light. A corner-cube prism.
2. Step 2. Reflection of light — is used in — Otoscope. A small mirror directs the light.
3. Step 3. Otoscope — has part — LED. Illumination.
4. Step 4. LED — is part of — Street light. LEDs.
5. Step 5. Street light — is part of — Tunnel. Lighting.
6. Step 6. Tunnel — uses — Chisel. Hezekiah’s Tunnel was cut by hand with chisels.

Open Evothings