Time verification of twilight begin and end at matrouh of egypt ... These observations were gathered using a refractor (an alt-azimuth scanner) of 10cm diameter associated with a photoelectric tube of the type (φ→Y−51) using 3-filters namely; the blue, visual and red filters....
Time verification of twilight begin and end at matrouh of egypt... These observations were gathered using a refractor (an alt-azimuth scanner) of 10 cm diameter associated with a photoelectric tube of the type (φ → Y − 51) using 3-filters namely; the blue, visual and red filters....
The kinetics of the rapid gas reaction between ozone and nitrogen dioxide... The output of the photoelectric tube is recorded by a time-exposure photograph of the screen of an oscilloscope.The...
High-sensitivity streak camera applicable to time-resolved spectroscopyA high-sensitivity streak camera has been designed and manufactured using a photoelectric tube with deflecting plates and a microchannel plate which serves as both a streak device and an image intensifier....