| Answer | Crossword Clue |
|---|---|
| coherers | COHERER, a device used to detect radio waves |
| coherer | a device used to detect radio waves |
| COHERER | Device used to detect radio waves |
| geophone | device that is placed on or in the ground and used to detect seismic waves |
| resonator | A device that displays electrical resonance, esp. one used for the detection of radio waves |
| resonators | A device that displays electrical resonance, esp. one used for the detection of radio waves |
| coherer | device usually used in detecting radio waves, as a tube filled with a conducting substance in granular form, whose electrical resistance increases when struck by radio waves |
