Well, the first thing you do is though I've never well, we could just figure out the focal length just by plugging into the formula.

So what's the reality?

So let's call that a directrix.

And let's say I have some other point.

And this is f2.

And it's for focus.

And what we want to do is, we want to find out the coordinates of the focal points.

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

It's not just focused on the particular, it's focused on kind of the metalevel.

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

And hard to keep focus.

We have focused on the worst case scenario.

Now we're asking you what is the focal length if an object of size 20 m that is 400 meters out if we observe it to be 1 mm on our projection surface.

Your focus,

Or b which is, remember, what was b?

And that's what we set out to figure out in the beginning.

Set here equivalent focal length assuming a 35mm film camera, in mm. A value of 0 means the focal length is unknown.

The picture will be there's a 2 meter tall person over here who is 10 meters away, there's a pinhole, and the focal plane is only 10mm away from the pinhole.

Let's focus on the conversations between our friends and our family and our coworkers and our loved ones.

And then we can essentially just add and subtract them from the center.

So, the focal points are going to sit along the semi major axis.

And that's the power of storytelling.

The focus of the talk is put on the content.

So they're very closely related.

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

Or they can be, I don't want to say always.

And this is very much like how the Victorian novel used fog in this way.

Focal length

Focal

Focal Length

Focal blur

Focal point

First Focus

Second Focus

Focal Length

Focal length

Here's my first question. Suppose X is 10 m in size.

That's an engineer gazing at tube number 36, trying to figure out why the memory's not in focus.

We also know that the projection of the building on the internal chip is 4mm in size.

So now, I started from the big problem, and I couldn't answer it.

But where's the focus point?

I'll do it on this right one here.

Aggregate economy. We now have millions of actors.

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

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