Digital waves carry information as a series of zeros and ones, known as binary code. Analog waves carry a continuous range of va
lues. Since each piece of digital information is simply a one or zero, it is possible to perfectly reproduce digital information over and over again. So a copy of the information carried by a digital wave can be identical to the original wave.
It is far more difficult to make a perfect copy of an analog wave because
A.
analog waves travel at speeds too great for modern technologies to use.
B.
the exact value of any one piece of information is not clearly defined.
C.
most analog waves have wavelengths that are too long to reproduce in copies.
D.
each individual piece of information is either a zero, a one, or a two.
The problem with analog information is that it cannot be defined and represented by a manageable set of numerical values that can be easily and precisely reproduced. For example a digital picture can be represented by pixels which can be coded by 1s and 0s and you can make numerous copies that look just like the original. On the other hand the image of a photograph is represented by a coating of light-sensitive chemicals on a paper or on a film and each time you copy it or print it there are variations. No two copies will be identical.
