That's our directrix and it has the equation y is equal to k.

And you enter that space, and you feel like, Wow!

So let's call that a directrix.

Your focus,

I'll call that well, we'll call that a focus because it will be a focus.

But where's the focus point?

Construct an ellipse with this focus

I'll do it on this right one here.

In this case the major axis is the vertical axis, so the focuses are going to sit here and here, and in this case, the focal lengths are going to be vertical down from the origin and vertical up from the origin, and we get, instead of it being a squared minus b squared, now since b is larger than a, the focal length, which is this, is going to be equal to b squared minus a squared.

It's equidistant from a focus and a directrix, where this is the focus.

And we will see so in a few special cases for this.

Construct a hyperbola with this focus

Construct a parabola with this focus

Or b which is, remember, what was b?

That's the point.

Fair enough.

I don't want to focus too much on the tax savings on interest.

The square root of that.

It looks something like that.

And this is f2.

And it's for focus.

Let's take it right there.

Which we already learned is b.

Though graphics hardware can definitely accelerate image processing operations. We'll mostly be focused on 3d rendering in this course.

A bloodline is determined and ordered.

And let's say I have some other point.

Construct a conic with this point as focus

This is our focus.

We say we have a parabola, and we're saying that this parabola is the set of all points that's equidistant between some focus and some directrix.

So there's one point that just by looking at it we could say is going to be in our locus.

So, if this point right here is the point, and we already showed that, this is the point the center of the ellipse is the point 1, minus 2.

And let's say that point let's put it right here is it the coordinate, let's call it a comma b.

Let's say it's x squared yz.

The walls of the egg then become impervious to other sperm so that only one sperm can get in, but that's not the focus of this video.

But that's not the focus of this video.

Focal length

Focal

Focal Length

Focal blur

Focal point

First Focus

Second Focus

Focal Length

Focal length

Focal length of the lens