Final answer:
Analog signals vary continuously, while digital signals switch between two fixed voltage values. Analog signals can have infinite information, while digital signals have finite information. Digital signals are more resistant to noise and can be easily transmitted and processed.
Step-by-step explanation:
Analog and digital signals differ in terms of the way information is represented and transmitted.
An analog signal varies continuously, meaning it can take on any value within a certain range. For example, a sound wave is an analog signal because it can have an infinite number of values for intensity.
In contrast, a digital signal switches between two fixed voltage values, usually represented as ones and zeros. This binary code allows for the representation of different states or levels of information. For example, in a digital audio signal, the sound wave is converted into a series of binary numbers that represent discrete samples of the sound at specific points in time.
While analog signals can have an infinite amount of information due to their continuous nature, digital signals can only represent a finite amount of information due to their discrete nature. However, digital signals are more resistant to noise and can be easily transmitted and processed by electronic devices.