MCQ Detailed View

Line of sight (LOS) communication is a method where signals travel directly from one point to another without any obstacles. For this kind of communication, the type of waves used are known as space waves. These are high-frequency electromagnetic waves, typically found in the VHF (Very High Frequency) and UHF (Ultra High Frequency) bands.

Space waves move in straight lines and require a clear, unobstructed path between the transmitting and receiving antennas. This is why LOS communication works well for short distances, where both devices can “see” each other directly. Space waves are used in technologies like mobile communication, television broadcasting, satellite communication, Wi-Fi, and microwave links.

Cable waves, in contrast, travel through physical wires such as coaxial or fiber optic cables, and are not used in LOS systems. Antenna waves is not a specific scientific term; antennas are devices that transmit or receive electromagnetic waves, including space waves, but the waves themselves are not called “antenna waves.”

Space waves are ideal for modern wireless communication because they can carry large amounts of data quickly. These waves can also reflect off surfaces like buildings or walls in certain conditions, which helps in urban environments, although clear LOS is always best for signal quality.

Understanding how space waves function is essential for grasping the basics of wireless communication, electromagnetic wave behavior, and radio frequency technology. These principles are part of everyday science and play a key role in how we use devices like smartphones, radios, and wireless internet on a daily basis.