Radar angels
Radar angels are an effect seen on radar displays when there is a periodic structure in the view of the radar that is roughly the same length as the signal's wavelength. The angel appears to be a physically huge object on the display, often miles across, that can obscure real targets. These were first noticed in the 1940s and were a topic of considerable study in the 1950s. The underlying mechanism is due to Bragg's law.
Q47528
radar
Concept
Q41364
wavelength
Concept
Q847354
Bragg's law
Concept
Q96400948
Radar angels
Concept
1940-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1940
DATE
1950-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1950
DATE
subclass of