How Your Television Works
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How Your Television Works
The Fluorescent Physicists
Download film (right-click)Demonstration , Engineering , Explanation , Physics , Secondary
A brief explanation of how your (CRT) TV works followed by a short experiment on electron beams.
Director's Notes:
An explanation of the combination of electron gun and fluorescent phosphors that make cathode-ray televisions work. The principle of magnetic steering of the electron beam is demonstrated using a cathode ray tube.
SciCast Notes:
I love love love the introduction of Johnny. That sort of thing is hard to arrange, and the team handle it with a brilliant deadpan delivery.
It’s also a well-written explanation of a subtly complex subject — it’s easy to start repeating oneself, or taking minutes to cover something that isn’t really important to the overall argument. So the editorial values here are excellent.
Two things would improve the film, in my book: firstly, punchier delivery. Yes, I know, I’m being picky. The presentation is clear and understandable, I just want it all — which in this case means a little more enthusiasm.
The second improvement is about how the film’s shot - particularly the opening sequence. It’s framed very loosely, with the presenters standing far apart, and their heads on the centre line of the frame. As a general rule, try to fill the frame with what you’re showing, to avoid all that wasted space around the edges. If you can get closer to your presenters and their props, we’ll see them more clearly, and your film will be much more involving for the viewer.
— Jonathan