Half the light is deflected on this screen, with a delicate photo-electric cell at its center.
"Out Around Rigel" by Robert H. Wilson
Besides the eye, the astronomers use a photographic plate, bolometer, a photo-electric cell, and other instruments.
"Lectures on Stellar Statistics" by Carl Vilhelm Ludvig Charlier
Photo-electric cells are capable of detecting ultra-violet light as you well know.
"Astounding Stories, March, 1931" by Various
The eyes use photo-electric cells, and relay what is before them to the Master Intelligence.
"Astounding Stories, July, 1931" by Various
You say the door is operated by means of a photo-electric cell?
"Penny Nichols Finds a Clue" by Joan Clark
For a high degree of accuracy in determining stellar magnitudes the photo-electric cell is unsurpassed.
"Astronomy" by David Todd
In this Thursday, Aug 6, 2009, file photo, an A123 Systems Inc high power Nanophospate Lithium Ion Cell for Hybrid Electric Vehicles battery is displayed in Livonia, Mich.
In this August 2009 file photo, an A123 Systems Inc high power Nanophospate Lithium Ion Cell for Hybrid Electric Vehicles battery is displayed in Livonia, Mich.