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balu736 [363]
3 years ago
10

name of a system of defense that became popular during World War II and is used to detect the presence of enemy aircraft- or any

aircraft- in a given area.
History
1 answer:
labwork [276]3 years ago
7 0

Answer:

It´s the radar.  It was one of the most useful technological inventions for warfare in the 20th century. Serious development as a military technology began in the 1930s. Radars helped detect enemy air attacks against military targets or bombing raids on cities. It works under the principle of detection of radio waves reflected by metallic objects.

Explanation:

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