Here's why:
* Electromagnetic energy: Radar uses radio waves, a form of electromagnetic radiation.
* Beaming at the surface: Radar systems transmit pulses of radio waves towards the ground.
* Recording reflected energy: The system then receives the radio waves that are reflected back from the surface.
The time it takes for the radio waves to travel to the surface and back, along with the strength of the reflected signal, provides information about the surface's characteristics, such as its shape, roughness, and composition.
This technology is widely used in various applications, including:
* Weather forecasting: To detect precipitation, wind speed, and other atmospheric conditions.
* Mapping: To create detailed topographic maps and monitor changes in the environment.
* Navigation: For aircraft, ships, and self-driving vehicles.
* Military applications: For surveillance, target identification, and guidance.
