Activity for Jamie Hanrahanâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Answer | — |
A: How do you aim a signal mirror? A modern (Korean War era and later, at least) signal mirror has a hole in the center, and the hole is surrounded by a grid of retroreflectors. You aim the mirror spot at something close by, then look through the hole. The grid makes a very bright spot where the mirror's reflection is going. You then ... (more) |
— | over 7 years ago |