Film is rearranged metal particles on tape which are read by an electromagnet. CDs are discs with burned pits in them which are read by a laser. What makes one analog and one digital?
In: Technology
CDs pits represent binary data, on or off. Film’s particles (or grain) can be any color, making it analog.
A good way to determine if something is analog vs digital is how the smallest unit of measurement can be measured. If it can only be on or off then it’s digital, but if it can be on, off, or some value in between then it’s analog.
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