The Electromagnetic Spectrum Poster - Educational Science Teaching Resource (A1 Size 59.4 x 84.1 cm)

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thermography: Any of several techniques for the remote measurement of the temperature variations of a body, especially by creating images produced by infrared radiation. radiograph. Provided by: Wiktionary. Located at: en.wiktionary.org/wiki/radiograph. License: CC BY-SA: Attribution-ShareAlike ozone layer: A region of the stratosphere, between 15 and 30 kilometres in altitude, containing a relatively high concentration of ozone; it absorbs most solar ultraviolet radiation. The microwave region of the electromagnetic (EM) spectrum is generally considered to overlap with the highest frequency (shortest wavelength ) radio waves. X-ray spectroscopy. Provided by: Wiktionary. Located at: en.wiktionary.org/wiki/X-ray_spectroscopy. License: CC BY-SA: Attribution-ShareAlike

Visible light is produced by vibrations and rotations of atoms and molecules, as well as by electronic transitions within atoms and molecules. The receivers or detectors of light largely utilize electronic transitions. We say the atoms and molecules are excited when they absorb and relax when they emit through electronic transitions. Colors that can be produced by visible light of a narrow band of wavelengths are called pure spectral colors. They can be delineated roughly in wavelength as: violet (380-450 nm), blue (450-495 nm), green (495-570 nm), yellow (570-590 nm), orange (590-620 nm), and red (620 to 750 nm). FM Radio: Frequency modulation for FM radio. (a) A carrier wave at the station’s basic frequency. (b) An audio signal at much lower audible frequencies. (c) The frequency of the carrier is modulated by the audio signal without changing its amplitude.

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Radio frequency. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Radio_frequency. License: CC BY-SA: Attribution-ShareAlike

ionizing radiation: high-energy radiation that is capable of causing ionization in substances through which it passes; also includes high-energy particles OpenStax College, College Physics. September 18, 2013. Provided by: OpenStax CNX. Located at: http://cnx.org/content/m42444/latest/?collection=col11406/1.7. License: CC BY: Attribution

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thermography. Provided by: Wiktionary. Located at: en.wiktionary.org/wiki/thermography. License: CC BY-SA: Attribution-ShareAlike Radio spectrum. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Radio_spectrum. License: CC BY-SA: Attribution-ShareAlike Infrared radiation. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Infrared_radiation. License: CC BY-SA: Attribution-ShareAlike emissivity: The energy-emitting propensity of a surface, usually measured at a specific wavelength.

visible light: the part of the electromagnetic spectrum, between infrared and ultraviolet, that is visible to the human eye Super high frequency. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Super_high_frequency. License: CC BY-SA: Attribution-ShareAlike Far-infrared, from 300 GHz (1 mm) to 30 THz (10 μm) – The lower part of this range may also be called microwaves. This radiation is typically absorbed by so-called rotational modes in gas-phase molecules, by molecular motions in liquids, and by phonons in solids. The water in Earth’s atmosphere absorbs so strongly in this range that it renders the atmosphere in effect opaque. However, there are certain wavelength ranges (“windows”) within the opaque range that allow partial transmission, and can be used for astronomy. The wavelength range from approximately 200 μm up to a few mm is often referred to as “sub-millimeter” in astronomy, reserving far infrared for wavelengths below 200 μm. radar: A method of detecting distant objects and determining their position, velocity, or other characteristics by analysis of sent radio waves (usually microwaves) reflected from their surfaces. There is a wide range of subcategories contained within radio including AM and FM radio. Radio waves can be generated by natural sources such as lightning or astronomical phenomena; or by artificial sources such as broadcast radio towers, cell phones, satellites and radar.

radiograph: An image, often a photographic negative, produced by radiation other than normal light; especially an X-ray photograph. OpenStax College, College Physics. December 19, 2012. Provided by: OpenStax CNX. Located at: http://cnx.org/content/m42444/latest/?collection=col11406/1.7. License: CC BY: Attribution Electromagnetic spectrum. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Electromagnetic_spectrum. License: CC BY-SA: Attribution-ShareAlike Visible Spectrum: A small part of the electromagnetic spectrum that includes its visible components. The divisions between infrared, visible, and ultraviolet are not perfectly distinct, nor are those between the seven rainbow colors. Gamma rays have characteristics identical to X-rays of the same frequency—they differ only in source. At higher frequencies, γ rays are more penetrating and more damaging to living tissue. They have many of the same uses as X-rays, including cancer therapy. Gamma radiation from radioactive materials is used in nuclear medicine.

Since audible frequencies range up to 20 kHz (or 0.020 MHz) at most, the frequency of the FM radio wave can vary from the carrier by as much as 0.020 MHz. For this reason, the carrier frequencies of two different radio stations cannot be closer than 0.020 MHz. An FM receiver is tuned to resonate at the carrier frequency and has circuitry that responds to variations in frequency, reproducing the audio information. OpenStax College, College Physics. December 17, 2012. Provided by: OpenStax CNX. Located at: http://cnx.org/content/m42444/latest/?collection=col11406/1.7. License: CC BY: Attribution Visible light, as called the visible spectrum, is the portion of the electromagnetic spectrum that is visible to (can be detected by) the human eye. Electromagnetic radiation in this range of wavelengths is often simply referred to as “light”. A typical human eye will respond to wavelengths from about 390 to 750 nm (0.39 to 0.75 µm). In terms of frequency, this corresponds to a band in the vicinity of 400–790 THz. A light-adapted eye generally has its maximum sensitivity at around 555 nm (540 THz), in the green region of the optical spectrum. The spectrum does not, however, contain all the colors that the human eyes and brain can distinguish. Unsaturated colors such as pink, or purple variations such as magenta, are absent, for example, because they can be made only by a mix of multiple wavelengths. gamma ray. Provided by: Wiktionary. Located at: en.wiktionary.org/wiki/gamma_ray. License: CC BY-SA: Attribution-ShareAlike non-ionizing radiation. Provided by: Wiktionary. Located at: en.wiktionary.org/wiki/non-ionizing_radiation. License: CC BY-SA: Attribution-ShareAlikeUltra high frequency. Provided by: Wikipedia. Located at: en.Wikipedia.org/wiki/Ultra_high_frequency. License: CC BY-SA: Attribution-ShareAlike X-rays have shorter wavelengths (higher energy ) than UV waves and, generally, longer wavelengths (lower energy) than gamma rays. Sometimes X-rays are called Röntgen radiation, after Wilhelm Röntgen, who is usually credited as their discoverer. Microwaves are electromagnetic waves with wavelengths ranging from as long as one meter to as short as one millimeter, or equivalently with frequencies between 300 MHz (0.3 GHz) and 300 GHz. The microwave region of the electromagnetic (EM) spectrum is generally considered to overlap with the highest frequency (shortest wavelength) radio waves. As is the case for all EM waves, microwaves travel in a vacuum at the speed of light. The prefix “micro-” in “microwave” is not meant to suggest a wavelength in the micrometer range. It indicates that microwaves are “small” because have shorter wavelengths as compared to waves used in typical radio broadcasting. The boundaries between far infrared light, terahertz radiation, microwaves, and ultra-high-frequency radio waves are fairly arbitrary. They are used variously between different fields of study (see figure). Boundless. Provided by: Boundless Learning. Located at: www.boundless.com//physics/definition/fm-radio-waves. License: CC BY-SA: Attribution-ShareAlike Exceptions to this convention occur in astronomy, where gamma decay is seen in the afterglow of certain supernovas, but other high energy processes known to involve other than radioactive decay are still classed as sources of gamma radiation. A notable example is extremely powerful bursts of high-energy radiation normally referred to as long duration gamma-ray bursts, which produce gamma rays by a mechanism not compatible with radioactive decay. These bursts of gamma rays, thought to be due to the collapse of stars called hypernovas, are the most powerful events so far discovered in the cosmos. Astrophysical processes are the only sources for very high energy gamma rays (~100 MeV).