Commons:Featured picture candidates/File:Sneeze.JPG

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File:Sneeze.JPG, not featured[edit]

Voting period is over. Please don't add any new votes.Voting period ends on 26 Apr 2011 at 18:36:16 (UTC)
Visit the nomination page to add or modify image notes.

A red-headed man sneezes - the vector is shown as well as the difficulty in keeping one's eyes open while sneezing
  •  Info created by the CDC - uploaded by TimVickers - nominated by One, please. ( Thank you.) 18:36, 17 April 2011 (UTC)[reply]
  •  Support -- One, please. ( Thank you.) 18:36, 17 April 2011 (UTC)[reply]
  •  Support - Hard to get, great encyclopedic value, nice quality. --Von.grzanka (talk) 18:39, 17 April 2011 (UTC)[reply]
  •  Support -- Disgusting, wow! -- Alvesgaspar (talk) 19:03, 17 April 2011 (UTC)[reply]
  •  Oppose -- Per Archeodontosaurus, below. Alvesgaspar (talk) 16:48, 23 April 2011 (UTC)[reply]
  •  Support   ■ MMXX  talk  20:58, 17 April 2011 (UTC)[reply]
  •  Support. Gesundheit. Jonathunder (talk) 21:30, 17 April 2011 (UTC)[reply]
  •  Question Does he actually sneez or inhale the "water"? The trails giving the impression that it travels in opposite direction. They should be bigger at the far end, because the drops will loose speed the longer they travel (air friction). Could someone explain this effect to me? -- ／人◕ ‿‿ ◕人＼ 苦情処理係 22:52, 17 April 2011 (UTC)[reply]
    • Looks normal to me: Gravity affects things that are heavier more dynamically, so larger droplets usually wouldn't travel as far before being pulled down as smaller ones would.[1][2] -- One, please. ( Thank you.) 05:05, 18 April 2011 (UTC)[reply]

      • I meant the trails of the single drops. That bigger drops would fall faster (bigger mass per volume or surface area) should be normal. So far i can follow. But the trail/bluring of a single drop should depend on exposure time. In this case i wonder why it is thicker at start (t1) and smaller and the end (t2) with t1 < t2.

        The only possibilities that won't violate basic physical laws i can think of are: a) The exposure was stronger at the start (t1) an got weaker to the end (t2). b) t2 is actually smaller then t1, reversing the complete progress. c) The drops are splitting apart due to air friction. -- ／人◕ ‿‿ ◕人＼ 苦情処理係 08:15, 18 April 2011 (UTC)[reply]

        • ...Uh, it's a guy sneezing. Because of biology, muscular movements, mouth movements, spasms and such I wouldn't assume the force of the sneeze was uniform the entire moment of it. Plus yes it could be due to friction with the air, we have no way of knowing what the atmospheric conditions of the setting were. That doesn't matter anyway because it doesn't negate the fact that this does illustrate a sneeze. Also, see the first pic I linked above. -- One, please. ( Thank you.) 14:57, 18 April 2011 (UTC)[reply]
          • Your current explanation has nothing to do with my question. I asked on the trails of single drops (the large ones), not the dust/smoke distribution. A moving sphere/ball/bullet would leave a trail like in this examples: [3] In case of this image the trails are inverted. Thats what im asking for. -- ／人◕ ‿‿ ◕人＼ 苦情処理係 15:22, 18 April 2011 (UTC)[reply]
            • Ok, I get you now. Your point is that we're taught to expect droplets to look like this when they fall [4], but a web image search found these for me[5][6][7]. So maybe yeah the droplets are either sheared by their speed from the sneeze (apparently a sneeze moves at 100mph [8]) or are our preconceptions possibly wrong? -- One, please. ( Thank you.) 17:45, 18 April 2011 (UTC)[reply]
              • Not as if they fall. The speed is most likely much higher as rain and i would not assume a drop like shape, that isn't even typical for water at higher speeds. But i would expect motion blur even at short exposure times. Maybe it is the flash light, as Alvesgaspar stated, which fires with full intensity and fades out to the end of the exposure. This would match the result and could cause the opposite motion blur effect. There where also at least 2 flash lights involved (visible at the beard). This could explain the "cut out" / shadow near the mouth. The only thing that i can't explain till now is the flow. After increasing the contrast drastically, which also revealed the true center of the stream (points far more upward), i looked at the right part. Big drops that tend to fall down are rising again after some distance. It might be turbulences. That is the point when you really want to see an video / the motion and not just an image. ;-) -- ／人◕ ‿‿ ◕人＼ 苦情処理係 18:23, 18 April 2011 (UTC)[reply]
  •  Comment -- It crossed my mind that this could be a composite image. The reasons: (i) I would expect the emission to be more directed to the ground; (ii) the origin of the emission, near the mouth, doesn't look natural; (iii) nothing from the nose? But I'm not convinced of my own doubts and the picture is amazing anyway. Of course, it it were manipulated, it should be mentioned in the image file and FP nomination. I think that the looking of the droplets has to do with the moment the flash fired: at the beginning of the exposure. -- Alvesgaspar (talk) 17:25, 18 April 2011 (UTC)[reply]
  •  Support Definitely makes an impact. I shared some of the doubts expressed above, but having now skimmed a bit of the literature about the topic, I'm willing to trust the CDC on this one. --Avenue (talk) 12:11, 20 April 2011 (UTC)[reply]
  •  Support -Jovian Eye talk 19:42, 20 April 2011 (UTC)[reply]
  •  Support   &#x95; Richard &#x95; [®] &#x95; 11:56, 21 April 2011 (UTC)[reply]
Changed my mind, because the trigger/release was a tiny bit to late. I've seen pictures where particles came out of the nose as well- that's what it needs to desribe sneezing more exactly. Here it could be coughing, too.   &#x95; Richard &#x95; [®] &#x95; 13:37, 21 April 2011 (UTC)[reply]
Confirmed results:
Result: 7 support, 6 oppose, 0 neutral → not featured. /George Chernilevsky talk 07:04, 27 April 2011 (UTC)[reply]
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