Visible light communication (VLC) is a wireless method that enables high-speed transmission of data with visible light. This data is transmitted by modulating the intensity of light given off by a LEDs. The signal is received by a photodiode device that transforms the data into forms that are readable and readily-consumed by end users.
Statement 1 is correct. Its biggest advantage is the size of the entire visible light spectrum, 380 to 700 nanometres.
Statement 2 is incorrect. The nature of light is that it is unable to pass through opaque surfaces, therefore it is a short-range transmission.
Statement 3 is correct. Transmission speed is VLC’s another advantage as light travels 186,000 miles per second, which is way faster than the 344 meters per second travelled by radio waves in air. A larger bandwidth and faster speed allow it to transmit large amounts of data at much higher speed compared to Bluetooth technology.
Statement 4 is correct. The Radio Frequency (RF) communication suffers from interference while Visible Light Communication (VLC) has high bandwidth and is immune to interference from electromagnetic sources.