User talk:98.67.107.90

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August 2010[edit]

Information.svg Please refrain from making unconstructive edits to Wikipedia, as you did at Talk:Motorola. Your edits appear to constitute vandalism and have been reverted or removed. If you would like to experiment, please use the sandbox. Thank you.  7  14:09, 6 August 2010 (UTC)

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Disambiguation pages[edit]

Please review the Manual of Style for disambiguation pages if you choose to continue revising them. Propaniac (talk) 16:48, 6 August 2010 (UTC)

Radar[edit]

Thanks for the added info, but I had to move some of them to the Principles section. The introduction to an article is not ment to explain every details but just to introduce the subject. The different sections are there to further the knowledge. There also redundant material, you have to read the article before writing somtheing that is already there.

I had to eliminate an erroneous information : radar are used to scan ground (ground-penetrating radar). The radiowaves do not need air to propagate, they can pass through any matter, but the penetration of the wave depends on the density of the material. In air or the void of space, radar signal can propagate farther. However, they can be used in the ground to a reach lesser length. As for the use underwater, very long lectromagnetic wavelenghts are used for communication with submarines and could be in theory be used for radar but would need a very large antenna which is unpractical.

Pierre cb (talk) 15:21, 7 August 2010 (UTC)
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