DV=1's and 0's; What exactly is analog?

[alenhard]

Just wondering about this question that occurred to me late last night and I realized I haven't the faintest idea. Anyone think they can explain it simply?

[Solarjetman]

In short, analog is represented as a waves. A digitial copy is just a collection of points along that wave. In order for a digital copy to work, it must have more than twice the sampling rate as the period of the wave.

You can think of analog as:
sin(x)

While digital is:
0, 0.0174, 0.0349 with a sampling every degree because...

sin(0) = 0
sin(1) = 0.0174
sin(2) = 0.0349

Now, Here is an article for you:

http://entertainment.howstuffworks.com/analog-digital.htm