MCQ Detailed View

Line of sight (LOS) communication is a method in which signals travel directly from the transmitting antenna to the receiving antenna without any barrier or obstacle in between. For this type of communication, the waves used are called space waves.

Space waves are a type of electromagnetic wave. These waves typically fall under the Very High Frequency (VHF) and Ultra High Frequency (UHF) bands of the radio spectrum. They travel in straight lines and are effective only when there is a clear and direct visual path between the transmitter and receiver. This is why the term "line of sight" is used—both antennas must be in each other’s sight without anything blocking the way.

Common applications of space waves include mobile phone communication, television broadcasting, satellite links, microwave transmission, and Wi-Fi networks. These waves can carry signals over short to moderate distances, especially in areas with few physical obstructions. Though they can reflect off buildings and other surfaces in urban areas, their best performance is achieved in direct paths.

It’s important to note that cable waves are not used for wireless communication. They require a physical medium like copper wire or optical fiber. The option “antenna waves” is incorrect because antennas transmit and receive waves, but the waves themselves are not named after the equipment.

Understanding space waves is a key topic in Physics, especially in areas related to electromagnetism and communication systems. It explains how modern wireless technology functions, from radios and mobile phones to satellite dishes and broadband internet.