Final answer:
Laser telephone transmission can carry more conversations per optical fiber compared to electronic transmission in a wire because it operates at a higher frequency, which allows for faster data transmission. ELF radio communication with submarines uses low frequencies that penetrate water but offer limited bandwidth. High-frequency microwaves are ideal for satellite and terrestrial communications.
Step-by-step explanation:
The rate at which information can be transmitted on an electromagnetic wave is indeed proportional to the frequency of the wave, meaning that higher frequency waves can transmit more data per unit time. This is consistent with the fact that laser telephone transmission at visible frequencies can carry more conversations per optical fiber than conventional electronic transmission in a wire, which operates at a lower frequency.
As for ELF (Extremely Low Frequency) radio communication with submarines, such communication uses very low frequencies that can penetrate deep into the ocean, but the trade-off is a much lower data transmission rate compared to higher frequencies.
Therefore, while laser transmission using optical fibers provides increased capacity for information transport due to their high frequency, ELF communications are limited in bandwidth but have the advantage of reaching submarines at great depths.
Since microwaves are high frequency waves, they can carry more information per unit time, making them suitable for satellite and long-distance terrestrial communications, as long as there is a clear line of sight between the transmitter and receiver.
This is due to the short wavelengths and high frequencies of microwaves which allow efficient data transmission but can be obstructed easily.