Final answer:
A carrier wave modulated for conveying information in telecommunications can be altered using amplitude, frequency, or phase modulation, with methods like AM and FM radio transmissions being common examples. Higher frequency waves can transmit more data, which is why optical fibers transmit more information than wires.
Step-by-step explanation:
In telecommunications, the waveform that is modulated or modified with an input signal for the purpose of conveying information is an example of a carrier wave. This carrier wave can be modulated in three different ways: through amplitude modulation (AM), frequency modulation (FM), or phase modulation. In the case of AM, the amplitude of the carrier wave is altered in accordance with the audio signal, while its frequency remains constant. The FM method varies the frequency of the carrier to encode information without changing the amplitude. Modulation makes efficient use of the electromagnetic spectrum and allows multiple signals to be transmitted over different frequencies without interference.
For example, in AM radio, the vibrations of the original sound are replicated by modulating the amplitude of the electromagnetic wave. On the other hand, cell phones and digital television typically convert signals into a binary sequence for more efficient and clear data transmission, a process called digital modulation.
The capacity of a carrier wave to transmit information effectively is directly related to its frequency, which explains why higher frequency waves, like those used in optical fibers for laser telephone transmission, can carry a significantly more considerable amount of information than lower frequency traditional electronic transmissions through wires.