Remote sensing uses electromagnetic waves in its procedure.

Remote sensing is the process of gathering information about the Earth's surface from a distance, typically using satellites or aircraft. It involves the detection and measurement of electromagnetic radiation (EMR) that is reflected or emitted from the Earth's surface. This information can be used to study and analyze various features and phenomena on the Earth, such as land cover, vegetation, ocean currents, and atmospheric conditions.

Electromagnetic waves:
Electromagnetic waves are a form of energy that can travel through space. They are characterized by their wavelength and frequency, and they include a wide range of wavelengths, from radio waves to gamma rays. The electromagnetic spectrum is divided into different regions based on these wavelengths, including radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays.

Use of electromagnetic waves in remote sensing:
Remote sensing utilizes the properties of electromagnetic waves to gather information about the Earth's surface. Different types of electromagnetic waves interact with different materials and features on the Earth's surface in various ways. By analyzing the reflected or emitted electromagnetic radiation, remote sensing techniques can provide valuable data about the Earth's surface and its characteristics.

Key points:
- Remote sensing uses electromagnetic waves to gather information about the Earth's surface.
- Different types of electromagnetic waves interact with different materials and features on the Earth's surface.
- By analyzing the reflected or emitted electromagnetic radiation, remote sensing techniques can provide valuable data about the Earth's surface and its characteristics.
- The electromagnetic spectrum includes a wide range of wavelengths, from radio waves to gamma rays.
- Remote sensing typically uses wavelengths in the visible, near-infrared, and thermal infrared regions of the electromagnetic spectrum.
- Visible and near-infrared wavelengths are often used to study vegetation, land cover, and atmospheric conditions.
- Thermal infrared wavelengths can provide information about surface temperature and thermal properties.
- Other regions of the electromagnetic spectrum, such as microwave and radar wavelengths, can also be used in remote sensing for specific applications, such as studying ocean currents and ice cover.