The electromagnetic spectrum (EMS) includes wavelengths of EM radiation ranging from short-wavelength (high-frequency) gamma rays to long-wavelength (low-frequency) radio waves. We focus on the region of the spectrum starting in the ultraviolet and continuing through the microwave wavelengths.
How electromagnetic spectrum is used in remote sensing?
For most purposes, the ultraviolet or UV portion of the spectrum has the shortest wavelengths which are practical for remote sensing. This radiation is just beyond the violet portion of the visible wavelengths, hence its name. … The light which our eyes – our “remote sensors” – can detect is part of the visible spectrum.
What is the electromagnetic spectrum in simple terms?
Definition: The electromagnetic spectrum is the entire range of wavelengths of all known electromagnetic radiations. It includes: Gamma rays have the smallest wavelengths and highest frequencies known. They are high energy waves capable of travelling long distances through air and are the most penetrating waves.
What is electromagnetic spectrum in GIS?
Electromagnetic spectrum (EMS) represents the continuum of electromagnetic radiation (EMR) arranged on the basis of wavelengths or frequency. Most common remote sensing systems operate in one or several of the visible, infrared and microwave portions of the electromagnetic spectrum. …
What are the benefits of electromagnetic waves?
The killing and destructive power of electromagnetic radiation can be used constructively for curing the incurable diseases by eradicating the disease producing pathogens and micro organisms like bacteria, virus & fungi.
What is meant by electromagnetic spectrum give its four uses?
The electromagnetic spectrum is a continuum of all electromagnetic waves arranged according to Waves and Frequency. EM spectrum uses are: Communication, treat cancer, sterilize medical equipment, killing living organisms.
What are the characteristics of electromagnetic spectrum?
The characteristics of the electromagnetic spectrum are the propagation features and the amount of information, which signals can carry. In general, signals sent using the higher frequencies have shorter propagation distances but a higher data-carrying capacity.
How do electromagnetic waves work?
Electromagnetic waves are created by the vibration of an electric charge. This vibration creates a wave which has both an electric and a magnetic component. An electromagnetic wave transports its energy through a vacuum at a speed of 3.00 x 108 m/s (a speed value commonly represented by the symbol c).
What is beyond the electromagnetic spectrum?
These represent the outer limits of the light that we can see, but the electromagnetic spectrum continues far beyond these narrow confines. At wavelengths slightly longer than red, we get infrared radiation, and beyond that we get terahertz radiation and then microwaves.
Is electromagnetic radiation harmful?
Despite extensive research, to date there is no evidence to conclude that exposure to low level electromagnetic fields is harmful to human health. The focus of international research is the investigation of possible links between cancer and electromagnetic fields, at power line and radiofrequencies.
What devices use electromagnetic waves?
Electromagnetic waves are ubiquitous in nature (i.e., light) and used in modern technology—AM and FM radio, cordless and cellular phones, garage door openers, wireless networks, radar, microwave ovens, etc. These and many more such devices use electromagnetic waves to transmit data and signals.