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You've Been Drawing Raindrops all Wrong

Let let the science of Blood Spatter explain what drops of liquid really look like during a free-fall.

Did you know that you’ve been drawing raindrops all wrong?

Let’s let the science of Blood Spatter explain.

Blood drops will take the shape of a sphere almost immediately upon separating from the blood source. Surprised? Blood (like water), is full of molecules. These molecules are attracted to each – when falling free in the air, the molecules pull inward and disperse evenly. This attraction causes the molecules to take the shape a sphere and also creates surface tension (a sort of “skin” which holds the sphere together.

The second photo shows blood in a “tear drop” shape – however, there’s a catch! This is what a droplet looks like when it’s dripping from an object. The molecules are pulled down by gravity, forming a rounded bottom and thin top. Eventually, the top gets so thin that it breaks and the droplet free falls – once again, forming a sphere.

Here’s the best part. On the right, is what a rain drop truly looks like. Your new science knowledge may have had you predicting a sphere (ok very small raindrops are almost spherical). However, larger raindrops are not sphere-shaped or tear-shaped.

Wave your hands in the air really fast – you feel that? (I’m sure you look awesome). That’s air resistance. Raindrops feel a lot of air resistance when falling from the sky – this resistance causes them to change shape. The bottom will either flatten, push up and inward or the drop will be entirely deformed while falling (not a pretty option for artwork).

Now you know what droplets look like when they’re falling… But what do they look like after they have hit a surface? To find out these Forensic secrets, you’ll have to join us in the Blood Spatter Lab. Get the Intel HERE

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