00:01
Parabolic mirrors have an advantage over spherical mirrors.
00:06
So if this was a curved mirror, right, and we drew the principal axis here, if you had whatever your object is and it was from far away, right, you'd have light rays coming in and they would go through the focus, right? no matter what they did, right? you could bounce around and they would all get focused right here at the focus.
00:28
If it's a parabolic mirror, then obviously it's based on a parabola.
00:36
And a parabola has an actual focus here.
00:40
If it were a circular mirror, which i'm going to draw and it's going to look kind of the same, what ends up happening, right, so that's the parabola one...