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The document describes the different regions of the electromagnetic spectrum, from gamma rays to radio waves. It provides the wavelength ranges and frequency ranges for each region, as well as some of their technological and natural applications. The regions are ordered from highest to lowest frequency and shortest to longest wavelength. Visible light, which the human eye can see, makes up only a small portion of the overall electromagnetic spectrum. The micron is used as the basic unit to measure wavelengths across the spectrum.
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This document discusses the electromagnetic spectrum. It describes how electromagnetic waves are periodic disturbances of electric and magnetic fields that all travel at the speed of light. The spectrum is characterized by frequency and wavelength, which are related by the speed of light. The spectrum ranges from low frequency radio waves to high frequency gamma rays and is divided into regions including radio, microwaves, infrared, visible light, ultraviolet, X-rays, and gamma rays. Each region has distinct wavelength ranges and applications. The document focuses on wavelengths used in remote sensing.F:\Electromagnetic Spectrum
F:\Electromagnetic Spectrumjc_elprofe
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Presentation on the elctromagnetic spectrum prepared at Wilson´s Hospital School. Suitable for senior Physics.Micro Wave Band 
Micro Wave Band Maneesha Dedigama
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This document discusses microwave imaging in the electromagnetic spectrum. It provides background on the microwave band, including its wavelength range from 1 millimeter to 1 meter. The document then discusses:
1) How microwave imaging forms images using the characteristics of microwave radiation and its interaction with different materials.
2) Applications of microwave imaging such as non-destructive testing, medical imaging, concealed weapon detection, and structural health monitoring.
3) Ongoing research on microwave imaging technologies for applications like breast cancer detection, stroke detection, and concealed weapon screening.
clelectromagnetic_waves_lesson04_presentation.ppt
clelectromagnetic_waves_lesson04_presentation.pptGeraldineMinong1
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The electromagnetic spectrum consists of electromagnetic waves ordered by increasing frequency and decreasing wavelength. Radio waves have the longest wavelengths and lowest frequencies, while gamma rays have the shortest wavelengths and highest frequencies. The electromagnetic spectrum includes radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays, and gamma rays. All electromagnetic waves travel at the speed of light in a vacuum.Name of region
- 1. Name of Region Wavelength Range (in m, μm, and nm) Frequency Range Technological Applications / Role in Nature Gamma Rays 10-14 to 10-10 m 10-8 to 10-4 μm 10-5 to 10-1 nm 3x1022 to 3x1018 Hz Radiation therapy X - Rays 10-14 to 10-8 m 10-8 to 10-2 μm 10-5 to 10 nm 3x1022 to 3x1016 Hz Radiation therapy; diagnosis (lower frequencies) Ultraviolet Rays 10-8 to 4x10-7 m 10-2 to 0.4 μm 10-5 to 400 nm 3x1016 to 0.75x1016 Hz Tanning; Promotes production of Vitamin D in human skin; photosynthesis in plants Visible Light 4x10-7 to 8x10-7 m 0.4 to 0.8 μm 400 to 800 nm 0.75x1016 to 0.375x1016 Hz Lamps for seeing (Eyes respond to this range) Infrared 8x10-7 to 10-3 m 0.8 to 103μm 800 to 106 nm 0.375x1016 to 3x1011 Hz Infrared photography Radio Waves 10-4 to 106 m 3x1012 to 300 Hz Communication devices Table 1: Regions of the entire electromagnetic spectrum and general applications.  In order of decreasing frequency (and increasing wavelength), the various regions of the electromagnetic spectrum are: gamma rays , x-rays ,ultraviolet , visible light , infrared , microwaves , and radio waves .  Electromagnetic energy from the sun consists mostly of a small amount of ultraviolet, all visible light, and some infrared.
- 2. ï‚· Light is a particular type of electromagnetic radiation that can be seen and sensed by the human eye, but this energy exists at a wide range of wavelengths. ï‚· The micron is the basic unit for measuring the wavelength of electromagnetic waves. ï‚· The spectrum of waves is divided into sections based on wavelength. The shortest waves are gamma rays, which have wavelengths of 10e-6 microns or less. The longest waves are radio waves, which have wavelengths of many kilometers. ï‚· The range of visible consists of the narrow portion of the spectrum, from 0.4 microns (blue) to 0.7 microns (red).