Hello
Hi! I love to learn about new things, what can you teach me?
Do you know anything about cinematography?
I know absolutely nothing about cinematography! What's interesting about it?
It comes from the greek word Kinema meaning motion or movement.
Oh I see, so it has something to do with pictures moving, right? At least that's what I'm gathering from the prefix cine-
Yes, it means to record motion. 
Oh, I see. Using a camera, I suppose, correct?
Yes, but the lens is the most important because it is used to focus light reflected from objects on to real images. Its a science.
A science, you say? So are there people out there trying to develop new lenses?
The pictures are then played back at a high speed creating the illusion of motion.