Weekly Photo Challenge – Structure – Water droplets

Water Droplets on Reed Leaf

Water molecules are attracted to each other by what is known as cohesion, in this case hydrogen bonding. If the water droplet is on a waxy surface, such as this leaf, the hydrogen atoms in each water molecule are attracted to hydrogen atoms in other water molecules, rather than to the molecules that make up the substance surface. If the surface was non waxy, such as paper, the water molecules would have a greater attraction to the paper surface, this is called adhesion, and the water would just spread out.

All substances try to exist at their lowest energy state, and for this to happen with a water droplet, each water molecule wants to be surrounded by other water molecules, and when this happens, they naturally form a spherical shape. However, we also have to take into account gravity, which of course acts downwards, and thus creates a flattened sphere like ‘structure’. Obviously, the smaller the droplet, the more spherical it is, and once it gets over a certain size, gravity exceeds the water tension, and the droplet collapses.

If I have any of the physics wrong, which is fairly likely (LOL!! ☺), please don’t hesitate to let me know in the comments below.

Almost Spherical Water Droplets on Grass Stem
Almost Spherical Water Droplets on Grass Stem

For another great mathmatical post, see Tara’s blog post, “Natural Numbers”, all about the Fibonacci Sequence.



42 thoughts on “Weekly Photo Challenge – Structure – Water droplets

  1. I love taking photos of rain droplets on leaves. Keep trying to capture dew on the Bowling Green. Really precious in our sunburnt country -but haven’t succeeded with the lens I use.

    Liked by 1 person

    1. I used a small compact camera to take these photos Meg, one day I hope to be in a position to buy a proper macro lens πŸ™‚
      I hate to admit this Meg, but you’ve commented on loads of my posts, and I don’t actually know where you come from, somewhere very warm, clearly πŸ™‚

      Liked by 2 people

      1. Certainly quite some difference between the two places Meg! I’m defintely going to be checking your blog out more often now, I know very little about Brisbane, other than it being the home of one or two famous Aussie cricketers πŸ™‚


  2. Enjoyed the pic and the explanation. I am amazed you took it with a small compact camera and not a macro. I thought for sure it was a macro. great job!

    Liked by 2 people

    1. Thank you Mary πŸ™‚ I’ve just been looking through some more old photos taken with a Canon Powershot A495 compact camera, some photos are in my next post, and like you, I’m amazed at how well they had come out – they are much better than I remembered them πŸ™‚


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