23 Oct
2007
23 Oct
'07
1:15 a.m.
Charles Henry wrote:
On 10/22/07, Martin Peach martin.peach@sympatico.ca wrote:
Mathieu Bouchard wrote:
A very simple way to explain aliased frequencies would be: spin a bicycle wheel. When you accelerate it beyond a certain point, it will begin to look like it's going backwards instead. This is because the wheel speed, together with the repetitiveness of the wheel's appearance, have crossed the Nyquist frequency of your eye.
That won't work in sunlight for example.
Haven't you ever seen it? (in sunlight that is)
No. The spokes just look blurred. Have you? If you try it at night under a streetlamp then you get the effect. I'm sure I have analog eyes ;)
Martin