File:Em-wave-applications-collage.jpg

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Original file ‎(2,560 × 1,708 pixels, file size: 1.06 MB, MIME type: image/jpeg)

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English: Some Applications of electromagnetic radiation: Mobile payment (top left), x-ray scanning (top right), microwave oven (bottom left) and radio astronomy (bottom right)
English: The 30-meter telescope on Pico Veleta in the Spanish Sierra Nevada is one of the two radio astronomy facilities operated by IRAM. Built in only four years (1980 to 1984) at an elevation of 2850 meters, it is one of today’s largest and most sensitive radio telescopes for tracing millimeter waves. The telescope is a classic single dish parabolic antenna, which allows the exploration of extended cosmic objects such as nearby galaxies and interstellar clouds. Due to its large surface, the 30-meter telescope is unrivalled in its sensitivity and is well adapted to detect weak sources. By pointing the telescope towards a celestial source, and then by scanning and tracking the source, one can build up radio images – whether of complete galaxies or regions of star formation in the Milky Way. With its ability to observe simultaneously at several wavelengths, the telescope can produce multiple images.
English: Mobile payment terminal, in Fornebu, Norway. Operated by NFC technology. Telenor.
English: matlåda, mikro, mikrovågsugn
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This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: arranged to collage. The original can be viewed here: Lunch box and microwave oven.jpg: .

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This image is a derivative work of the following images:

  • File:Lunch box and microwave oven.jpg licensed with Cc-by-2.0
    • 2020-05-23T15:18:02Z Kyllo 5137x3425 (7882710 Bytes) Uploaded a work by Trausti Evans from https://www.flickr.com/photos/114303073@N05/25117841759/ with UploadWizard

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Date/TimeThumbnailDimensionsUserComment
current15:42, 30 December 2023Thumbnail for version as of 15:42, 30 December 20232,560 × 1,708 (1.06 MB)MikeRun (talk | contribs)== {{int:filedesc}} == {{Information |Description={{en|1=This setup consists of a HD-S (high speed green) phosphor screen, and a 90kV, 15 milliamp real X-ray tube with a 1.5 amp 12 volt hot cathode. I took the photo running the tube at 60kV and around 2 milliamps. The exposure took 30 seconds, and the green phosphor shadow was post-processed to turn it into the more recognisable negative cyan X-ray transparency. I use an old 20D camera because X-rays DO in fact damage CCD's as I found an i...

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