Howtosignalprocessing
- What is the role of electromagnetic spectrum in remote sensing?
- What are the different types of electromagnetic wave used in remote sensing?
- What is the relationship between the wavelength frequency and energy of electromagnetic waves?
- Which remote sensing technique listed below uses the longest wavelengths of electromagnetic energy?
What is the role of electromagnetic spectrum in remote sensing?
Remote sensing uses a part or several parts of the electromagnetic spectrum. It records the electromagnetic energy reflected or emitted by the earth's surface. The amount of radiation from an object (called radiance) is influenced by both the properties of the object and the radiation hitting the object (irradiance).
What are the different types of electromagnetic wave used in remote sensing?
Remote Sensing
Optical sensors are used to measure ultraviolet, visible, and infrared wavelengths, and microwave sensors are used for the microwave portion of the EMS.
What is the relationship between the wavelength frequency and energy of electromagnetic waves?
The energy associated with EM radiation is proportional to frequency and inversely proportional to wavelength. Thus, EM waves with shorter wavelengths have more energy. Examples of EM radiation (from lowest to highest energy) include radio waves, microwaves, infrared, visible light, UV, and radiographs (Fig. 3.1).
Which remote sensing technique listed below uses the longest wavelengths of electromagnetic energy?
And if we go to the electromagnetic spectrum and we look up infrared, ultraviolet visible and radio waves, radio waves has this longest wavelength, least amount of energy. So the answer is, NMR uses the longest wavelength.
