spiral Blue

Blue Light in Sky Over Central Valley CA (not a UFO, cops found guys with gliders in park)

2nd of 3 videos taken over a 10-15, maybe 20 minute period on Dec 4th, '09 around 7:30-8pm. I have no idea what this is, and I don't allow my kids to cuss like you may hear on one of these videos!
NEW: I'm so tired of the this is fake comments, IT IS FAKE!! We later found out it was 2 guys with radio controlled gliders in a nearby park. End of story.

But what is the Fourier Transform? A visual introduction.

An animated introduction to the Fourier Transform.
Home page:
Brought to you by you:

Follow-on video about the uncertainty principle:

Interactive made by a viewer inspired by this video:


Also, take a look at this Jupyter notebook implementing this idea in a way you can play with:


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Animations largely made using manim, a scrappy open-source python library.

If you want to check it out, I feel compelled to warn you that it's not the most well-documented tool, and has many other quirks you might expect in a library someone wrote with only their own use in mind.

Music by Vincent Rubinetti.
Download the music on Bandcamp:


Stream the music on Spotify:


If you want to contribute translated subtitles or to help review those that have already been made by others and need approval, you can click the gear icon in the video and go to subtitles/cc, then add subtitles/cc. I really appreciate those who do this, as it helps make the lessons accessible to more people.
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3blue1brown is a channel about animating math, in all senses of the word animate. And you know the drill with YouTube, if you want to stay posted on new videos, subscribe, and click the bell to receive notifications (if you're into that).

If you are new to this channel and want to see more, a good place to start is this playlist:

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