Physics
RADAR is used for:

locating submerged submarines.
locating geostationary satellites.
detecting and locating the position of objects such as Aeroplanes.
receiving a signals in a radio receiver.

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Physics
Which one of the following is not a property of electromagnetic waves?

Electromagnetic waves do not require a medium to propagate.
Oscillating electric field and magnetic field are perpendicular to each other.
Electromagnetic waves do not show interference and diffraction.
Electromagnetic waves are transverse waves

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