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What technology uses radio frequency to identify objects?

  1. Bluetooth Technology

  2. Near Field Communication (NFC)

  3. Radio Frequency Identification (RFID)

  4. Infrared Communication

The correct answer is: Radio Frequency Identification (RFID)

Radio Frequency Identification (RFID) is the technology that utilizes radio frequency to identify objects. It operates through the use of RFID tags, which contain small chips and antennas that can transmit data to a reader using radio waves. This allows for automatic identification and tracking of objects without the need for direct line-of-sight, offering efficiency in various applications like inventory management, asset tracking, and even access control systems. The reason RFID stands out among the options provided is its specific design and application solely for identification and tracking purposes via radio frequencies. Other technologies, while related to wireless communication, serve different functions. For example, Bluetooth technology is primarily used for short-range data exchange between devices, while Near Field Communication (NFC) focuses on very close-range interactions. Infrared communication, on the other hand, relies on light waves for transmission, which provides a very different method of object identification. Thus, RFID's unique capability in the context of object identification solidifies it as the correct response.