| Answer | Crossword Clue |
|---|---|
| phototube | an electron tube with a photoemissive cathode |
| phototubes | PHOTOTUBE, an electron tube with a photoemissive cathode |
| phototubes | A photocell in the form of an electron tube with a photoemissive cathode |
| phototube | A photocell in the form of an electron tube with a photoemissive cathode |
| raster | a scan pattern (as of the electron beam in a cathode-ray tube) in which an area is scanned from side to side in lines from top to bottom |
| flyback | the return to its starting point of the electron beam in a cathode ray tube, as after the completion of a line in a television picture or of a trace in an oscilloscope |
