2.  RADAR which stands for RAdio Detection And Ranging was developed by Britain in the late 1930’s, during WW2  Before the war, Radars were used to detect objects through the usage of radio waves  Now, they use RADAR to determine the location of moving or standing objects such as planes, ships, etc.

3.  A RADAR basically first sends out radio waves in order to discover the location of the desired object  Once the collective group of radio waves has found its object, it will scatter and reflect off it  These signals are then picked up by the receiver which translates the electrical waves into a monitor

4.  The Doppler Effect, learned in Chapter 16, is displayed through these radars  The frequency of these radio waves changes as the location relative to the antenna and the object changes

6.  Uses for military: locating airplanes, ships, missiles, etc.; targets buildings and other objects;  Uses for astronomy: locating and viewing objects in space  Uses for ocean: locating ships and animals  Uses for air: airlines utilize radars to ensure the safety and location of various planes

8.  The benefits of radars can be reversed if used for wrong purposes (ex. Missiles)  Dependency on radars can be disastrous for airlines or ships that can lose radio transmission through jamming, severe weather, etc.  Low risk of radiation due to transmission

10. http://www.youtube.com/watch?v=kFo h7_JssuQ