| 1. | Illinois physics professor Jakob Kunz suggested that Stebbins try a photoelectric cell.
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| 2. | :Photoelectric cells individually have a wavelength at which they are most efficient.
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| 3. | The transformer includes a timer or photoelectric cell to activate the lights.
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| 4. | The light pen itself had a small photoelectric cell in its tip.
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| 5. | The development of the photoelectric cell by Jakob Kunz revolutionized astronomical photometry.
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| 6. | It is automatic and electric, its light controlled by photoelectric cells.
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| 7. | Kunz had been doing experimentation on an improved photoelectric cell which was alkali based.
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| 8. | The transmitter projects an array of parallel photoelectric cells.
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| 9. | Besides, I'm not aware of anything like a photoelectric cell that works on infrared wavelengths.
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| 10. | Cobb's Sunmobile model had 12 selenium photoelectric cells on top of a balsa wood body.
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