The Defining Technology of World War II is RADAR

November 20, 1941
Photo of This antenna is a 1943 production version of the radar that tracked the incoming Japanese raid on Oahu, Hawaii on 7 December 1941 This antenna was donated by the Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada. It was used by the university to study Aurora Borealis at frquencies of 58 and 106 MHz. It collected some of the very first radar echoes from the "Northern Lights"
This antenna is a 1943 production version of the radar that tracked the incoming Japanese raid on Oahu, Hawaii on 7 December 1941 This antenna was donated by the Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, Canada. It was used by the university to study Aurora Borealis at frquencies of 58 and 106 MHz. It collected some of the very first radar echoes from the "Northern Lights" Image source: brewbooks, CC BY-SA 2.0 , via Wikimedia Commons