Rain Drop

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Rain Drop

  1. 1. What is the shape of Rain Drop? http://www.es.jamstec.go.jp/esc/research/Perception/g_stills/rainfall.jpg
  2. 2. Is the shape like….
  3. 3. The shape of Rain Drop is… <ul><li>X in drop shape </li></ul><ul><li>Different size > different shape </li></ul>
  4. 4. <ul><li>The possible drop size in nature was around 5-6mm. </li></ul>The Experiments of Phillipp Lenard <ul><li>Small drops (> 2mm) </li></ul><ul><ul><li>As spheres </li></ul></ul><ul><li>Large drops (> 2mm) </li></ul><ul><ul><li>Flattened bottom and rounder top </li></ul></ul><ul><li>Extreme large drops (> 5.5mm) </li></ul><ul><ul><li>Breading aparts </li></ul></ul>
  5. 5. Why? <ul><li>is caused by the air flow </li></ul><ul><li>pushes against the lower drop surface </li></ul><ul><li>thus flattens its base as it falls </li></ul>
  6. 6. The model of rain fall
  7. 7. For information <ul><li>Raindrop Shape: No More Tears </li></ul><ul><ul><li>http://www.suite101.com/article.cfm/science_sky/91232/1 </li></ul></ul><ul><li>Are raindrops shaped like teardrops? </li></ul><ul><ul><li>http:// ga.water.usgs.gov/edu/raindropshape.html </li></ul></ul>
  8. 8. http://www.es.jamstec.go.jp/esc/research/Perception/g_stills/raindrops.jpg

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