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      <title>Electromagnetic Waves by NOOR HILLAH</title>
      <link>https://padlet.com/3346841/yzb4cqtnfw1b</link>
      <description>NR 23</description>
      <language>en-us</language>
      <pubDate>2019-01-28 18:55:16 UTC</pubDate>
      <lastBuildDate>2019-01-28 19:37:20 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>1#Far infrared</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325098567</link>
         <description><![CDATA[<div> is a region in the infrared spectrum of electromagnetic radiation, also Far infrared is often defined as any radiation with a wavelength of 15 micrometers (µm) to 1 mm (corresponding to a range of about 20 T Hz to 300 GHz) <a href="https://en.wikipedia.org/wiki/Far_infrared">https://en.wikipedia.org/wiki/Far_infrared</a></div>]]></description>
         <enclosure url="https://barbarawellnesscm.files.wordpress.com/2014/05/far-infrared-information.jpg" />
         <pubDate>2019-01-28 18:58:25 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325098567</guid>
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      <item>
         <title>2#Electromagnetic spectrum</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325100195</link>
         <description><![CDATA[<div>the entire distribution of electromagnetic radiation according to frequency or wavelength. Although all electromagnetic waves travel at the speed of light in a vacuum, they do so at a wide range of frequencies, wavelengths, and photon energies. <br><a href="https://www.britannica.com/science/electromagnetic-spectrum">https://www.britannica.com/science/electromagnetic-spectrum</a></div>]]></description>
         <enclosure url="http://en.es-static.us/upl/2012/05/em_spectrum.png" />
         <pubDate>2019-01-28 19:01:21 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325100195</guid>
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         <title>3#Gamma radiation</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325101646</link>
         <description><![CDATA[<div>is a penetrating electromagnetic radiation arising from the radioactive decay of atomic nuclei. It consists of the shortest wavelength electromagnetic waves and so imparts the highest photon energy. <br><a href="https://en.wikipedia.org/wiki/Gamma_ray">https://en.wikipedia.org/wiki/Gamma_ray</a></div>]]></description>
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         <pubDate>2019-01-28 19:03:59 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325101646</guid>
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      <item>
         <title> 4#Infrared radiation</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325102650</link>
         <description><![CDATA[<div>is a type of electromagnetic radiation, as are radio waves, ultraviolet radiation, X-rays and microwaves.<br><a href="https://www.livescience.com/50260-infrared-radiation.html">https://www.livescience.com/50260-infrared-radiation.html</a></div>]]></description>
         <enclosure url="http://redsun.bg/wp-content/uploads/2011/05/InfraredWavesBody.jpg?x72005" />
         <pubDate>2019-01-28 19:05:35 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325102650</guid>
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      <item>
         <title>5#Microwave radiation</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325103408</link>
         <description><![CDATA[<div> are a form of electromagnetic radiation with wavelengths ranging from about one meter to one millimeter; with frequencies between 300 MHz (1 m) and 300 GHz (1 mm).<br><a href="https://en.wikipedia.org/wiki/Microwave">https://en.wikipedia.org/wiki/Microwave</a></div>]]></description>
         <enclosure url="http://www.maryvancenc.com/wp-content/uploads/2013/07/url-14.jpeg" />
         <pubDate>2019-01-28 19:06:48 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325103408</guid>
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      <item>
         <title>6#Near infrared</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325104899</link>
         <description><![CDATA[<div> is a spectroscopic method that uses the near-infrared region of the electromagnetic spectrum (from 780 nm to 2500 nm).<br><a href="https://en.wikipedia.org/wiki/Near-infrared_spectroscopy">https://en.wikipedia.org/wiki/Near-infrared_spectroscopy</a></div>]]></description>
         <enclosure url="https://upload.wikimedia.org/wikipedia/commons/thumb/d/dd/Ethanol_near_IR_spectrum.png/1200px-Ethanol_near_IR_spectrum.png" />
         <pubDate>2019-01-28 19:08:42 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325104899</guid>
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      <item>
         <title>7#Photoelectric effect</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325105993</link>
         <description><![CDATA[<div> is the emission of electrons or other free carriers when light shines on a material. Electrons emitted in this manner can be called photo electrons. This phenomenon is commonly studied in electronic physics, as well as in fields of chemistry, such as quantum chemistry or electrochemistry.<br><a href="https://en.wikipedia.org/wiki/Photoelectric_effect">https://en.wikipedia.org/wiki/Photoelectric_effect</a></div>]]></description>
         <enclosure url="http://slideplayer.com/8910085/27/images/14/Photoelectric+Effect.jpg" />
         <pubDate>2019-01-28 19:10:30 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325105993</guid>
      </item>
      <item>
         <title>8#Picometer</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325107270</link>
         <description><![CDATA[<div> is a derived metric measurement unit of length.<br><a href="https://www.aqua-calc.com/what-is/length/picometer">https://www.aqua-calc.com/what-is/length/picometer</a></div>]]></description>
         <enclosure url="https://i.pinimg.com/736x/44/18/39/4418393605de9d27b0445b69bc7278b5--scientific-notation-prefixes.jpg" />
         <pubDate>2019-01-28 19:12:08 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325107270</guid>
      </item>
      <item>
         <title>9#Radio wave</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325107988</link>
         <description><![CDATA[<div>are a type of electromagnetic radiation with wavelengths in the electromagnetic spectrum longer than infrared light. Radio waves have frequencies as high as 300 gigahertz (GHz) to as low as 30 hertz (Hz).<br><a href="https://en.wikipedia.org/wiki/Radio_wave">https://en.wikipedia.org/wiki/Radio_wave</a></div>]]></description>
         <enclosure url="http://lerablog.org/wp-content/uploads/2016/06/radiowaves-1024x606.gif" />
         <pubDate>2019-01-28 19:13:32 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325107988</guid>
      </item>
      <item>
         <title>10#Ultraviolet</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325108497</link>
         <description><![CDATA[<div> a band of the electromagnetic spectrum with wavelength from 10 nm to 400 nm, shorter than that of visible light but longer than X-rays.<br><a href="https://en.wikipedia.org/wiki/Ultraviolet">https://en.wikipedia.org/wiki/Ultraviolet</a></div>]]></description>
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         <pubDate>2019-01-28 19:14:26 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325108497</guid>
      </item>
      <item>
         <title>11#Visible light radiation</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325108979</link>
         <description><![CDATA[<div>is the portion of the electromagnetic spectrum that is visible to the human eye. Electromagnetic radiation in this range of wavelengths is called visible light or simply light.<br><a href="https://en.wikipedia.org/wiki/Visible_spectrum">https://en.wikipedia.org/wiki/Visible_spectrum</a></div>]]></description>
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         <pubDate>2019-01-28 19:15:19 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325108979</guid>
      </item>
      <item>
         <title>12#Wave-particle duality</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325109743</link>
         <description><![CDATA[<div> is the concept in quantum mechanics that every particle or quantum entity may be partly described in terms not only of particles, but also of waves. It expresses the inability of the classical concepts "particle" or "wave" to fully describe the behaviour of quantum-scale objects. <br><a href="https://en.wikipedia.org/wiki/Wave%E2%80%93particle_duality">https://en.wikipedia.org/wiki/Wave%E2%80%93particle_duality</a></div>]]></description>
         <enclosure url="https://i.ytimg.com/vi/jAMzEfn_xTk/maxresdefault.jpg" />
         <pubDate>2019-01-28 19:16:39 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325109743</guid>
      </item>
      <item>
         <title>13#X-ray radiation</title>
         <author>3346841</author>
         <link>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325110178</link>
         <description><![CDATA[<div> a form of electromagnetic radiation. Most X-rays have a wavelength ranging from 0.01 to 10 nanometers, corresponding to frequencies in the range 30 petahertz to 30 exahertz (3×1016 Hz to 3×1019 Hz) and energies in the range 100 eV to 100 keV. <a href="https://en.wikipedia.org/wiki/X-ray">https://en.wikipedia.org/wiki/X-ray</a></div>]]></description>
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         <pubDate>2019-01-28 19:17:25 UTC</pubDate>
         <guid>https://padlet.com/3346841/yzb4cqtnfw1b/wish/325110178</guid>
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