from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An electron tube with a photosensitive cathode.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A gas-filled electron tube that has a photosensitive cathode
Sorry, no etymologies found.
Used primarily as a detector of alpha particles, however, the multiplier phototube was not limited to alpha or beta measurements, as the authors argued.
A fraction of the scattered light goes back into the hole, detected by a phototube on the optical dust logger.
- stereomicroscope (two oculars) - suitable for biology (top-lit, preferred range 10x to 60x) - trinocular (phototube on top) - affordable price