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Wireless QOTD for May 17th

Discussion in 'Wireless' started by tripwire45, May 17, 2004.

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Patrick is studying for his wireless certification exam. He is reading about an effect where the ra

  1. A. Patrick is reading about Refraction

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  2. B. Patrick is reading about Reflection

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  3. C. Patrick is reading about Diffraction

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  4. D. Patrick is reading about Absorption

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  5. E. Patrick is reading about Scattering

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  1. tripwire45
    Honorary Member

    tripwire45 Zettabyte Poster

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    Answer later.
     
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  2. Phil
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    Phil Gigabyte Poster

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    My guess for today is E
     
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  3. AJ

    AJ Administrator Administrator

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    E seems the most sensible <trying to remember my physics from 20 years ago> :?
     
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  4. tripwire45
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    tripwire45 Zettabyte Poster

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    Still more time, folks. Any other takers?
     
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  5. tripwire45
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    tripwire45 Zettabyte Poster

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    Only a little over an hour to go. Anybody else?
     
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  6. tripwire45
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    tripwire45 Zettabyte Poster

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    Time's up. Correct answer is C: Diffraction. Diffraction happens when a radio wave front bends around an intervening object with sharp, irregular angles or a rough surface (usually a building in the case of outside transmissions). Consider how, when you drop a pebble in a pond that the wave front will bend around a twig sticking up through the surface, sending part of that front in a different direction.

    Scattering (since it was the runaway favorite) occurs when the medium through which the wave travels consists of objects that are small and irregular. This happens when a wave front strikes the ground and the ground at that spot is composed of gravel (off-the-top-of-my-head example). The wave strikes the uneven surface and is scattered in about a jillion different directions. The statement in the original question spoke of the wave front being "polarized" which implies that it travels in a single direction. Scattering wouldn't produce a polarized effect.

    Sorry for the long answer here, folks. We'll have another qotd tomorrow.
     
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  7. Jakamoko
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    Jakamoko On the move again ...

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    I don not believe this - I just came to this question now, answered C (and voted) only to scroll down to see it was closed, and was indeed C

    Like any of you are gonna believe me .... :roll:
     
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  8. tripwire45
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    tripwire45 Zettabyte Poster

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    Well...it could have happened that way... :wink: No problem. The tragedy is that you were the only one right...too late. :(
     
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  9. Jakamoko
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    Jakamoko On the move again ...

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    No worries, Trip - I'm satisfied that I was right, even if no-one else believes me, and the irony is that that was the first one of your Wireless questions that I actually knew that it was the right answer.

    Oh well, another day .... :roll:
     
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  10. tripwire45
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    tripwire45 Zettabyte Poster

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    Don't worry. You get an "A" for the day. :)
     
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