Visualizing Magnetic Interference Patterns with Ferrofluid

Constructive and destructive interference is perfectly toroidal or donut shape.

And of course, the negative image of a donut shape is, of course, a hyperboloid or an hourglass shape.

So if you actually take the negative image of this, you will see the dielectric.

Now, this is a really weak magnet. I'll show you a really powerful magnet here in a second, and I'll show you how much more sensitive this structure, this, uh, this new, uh, super sensitive super cell is.

But look as I actually, uh, uh, skim along the edge.

Now, realize that the liquid showing the constructive and destructive, uh, interference is infinitely, infinitely thinner than a human hair, and what we're doing is we're using the light and the dispersed ferrofluid.

The ferrofluid is not clumping, by the way.

The dispersed ferrofluid is, uh, is, uh, all through this.

The only reason why you're seeing light, uh, stripes in certain areas and dark stripes in others is constructive and destructive interference between the magnetic and dielectric.

Now, I'll explain this in other videos, and I have in the past, but also in my book.

You see these little bright spots right here?

Those little tiny, uh, bright spots along the lines of intersection?

You see those here? Let me actually zoom in a little better.

You see these little bright spots right here and here and here?

You notice they occur at lines of intersection.