England invention/use of Radar

By: KyLee Lundell

Big image
This is a map showing all of the radars in the world in 1940.

Early Military Radar System

The first practical radar system was produced in 1935 by the British physicist Sir Robert Watson-Watt, by 1939 England had established a chain of radar stations along its south and east coasts to detect enemies on the sea or in the air

Big image
This is an early radar system that would detect submarines, ships, and airplanes.

Use of Technology

The reason they used these radar systems is because of surprise attacks or when the country wants to know who is someone and how far away they are. The radar would send radio waves out and when they hit a metal object they would be sent back to that radar.
Big image
The image above is also showing another style of a late time radar.

Significance on WWII

England had chains of radar systems along side of the east and west coast. During WWII there were also 2 other major scientists that would be working on upgrades like the Resonant-Cavity Magnetron which is a tube that can generate high-frequency radio pulses with large amounts of power. The radar was also being used on ships and aircraft's during the war. Germany was using the radar by 1940 and Japan never effectively used the radar. The United States was able to predict the attack on Pearl Harbor because of the radar system that they ha in that point of time.
Big image
The image above shows a radar that was created in 1944.

Background information

The history of radar starts with experiments by Heinrich Hertz in the late 19th century that showed that radio waves were reflected by metal objects. This possibility was suggested in James Clerk Maxwell's seminal work on electromagnetism. It was not until the early 20th century that systems able to use these principles were becoming widely available, and it was German inventor Christian Hulsmeyer who first used them to build a simple ship detection device intended to help avoid collisions in the fog.
Big image
In this image above it shows ships or airplanes approaching a target, or where the radar is located, which would be in the middle of the radar.


"History of the Ultrasound." N.p., n.d. Web. <http://www.ob-ultrasound.net/radar.html>.

Sim, Philip. Making Waves: Robert Watson-Watt, the Pioneer of Radar. N.p., 15 May 2014. Web. 9 Feb. 2016. <http://www.bbc.com/news/uk-scotland-tayside-central-27393558>.

"Radar during World War II." - Engineering and Technology History Wiki. N.p., n.d. Web. 09 Feb. 2016. <http://ethw.org/Radar_during_World_War_II>.