Mostly unknown Logic behind snapping / clicking of fingers.

Knowledge: What is something that most people don't know?

This is something I got to know recently while I was snapping my fingers. A lot of people think that the sound created while snapping fingers is due to friction or tension between the index finger and the thumb.
As shown below.

But actually this is not the case. The sound is created when your finger hits the palm.
As shown below
Now if you want to check if this is true or not,you can put a small paper,phone,or anything on your palm and then snap your fingers. You will now notice that the sound has changed.

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