Activity for HighTechGeekâ€
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Question | — |
How large of a telescope would one need in order to read someone's lips on a planet light years away? If I wanted to image an Earth-like planet at a resolution where one could read the lips of a human speaking on the surface 1, 10, and 1000 light years away, how large would the telescope reflector need to be (the diameter) in each case? Another way to ask my question is: Given a parabolic mirror/ref... (more) |
— | almost 8 years ago |