| # | Clue | Answer As Given | Value | Round | Category | Air Date | Show |
|---|---|---|---|---|---|---|---|
| In 1608 its inventor offered it exclusively to the Dutch government for military use | telescope | FJ | SCIENTIFIC INVENTIONS | 1999-03-19 | #3355 | ||
| Hans Lippershey invented the first of these by mounting a lens at each end of a tube | the telescope | $500 | J | INVENTIONS | 1994-06-22 | #2273 | |
| 1st credited to Hans Lippershey in 1608, it was Galileo, in 1609, who first used it to look up | the telescope | $400 | DJ | INVENTIONS | 1985-11-22 | #315 |