Page "learned" Paragraph 1351
from
Brown Corpus
The second photocathode and both phosphor surfaces are deposited on the fiber plate substrates.
The photocathode sensitivities S, phosphor efficiencies P, and anode potentials V of the individual stages shall be distinguished by means of subscripts 1, and 2, in the text, where required.
Both stages are assumed to have unity magnification.
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