Correct Option (c)
Statements 1, 3, and 4 are correct.
Statement 1: Visible Light Communication (VLC) operates within the visible light spectrum. This range typically spans wavelengths from approximately 375 nanometers (nm) for violet light to 780 nm for red light.
Statement 3: VLC systems, such as those employing Li-Fi technology, are capable of achieving significantly higher data transfer rates compared to Bluetooth. VLC can support data speeds in the gigabits per second (Gbps) range, facilitating the rapid transmission of large data volumes.
Statement 4: VLC utilizes visible light for data transmission rather than radio frequencies (RF). Consequently, it is inherently immune to electromagnetic interference (EMI). This characteristic makes VLC particularly suitable for use in environments sensitive to RF emissions, such as hospitals, aircraft, and nuclear power plants.
Incorrect Options
Statement 2 is incorrect. VLC is primarily a short-range optical wireless communication technology. Its operation typically requires a direct line-of-sight path between the transmitter and receiver, and its effective range is limited. Therefore, it is not considered a long-range communication solution.
Option (a) is incorrect because it includes statement 2, which is false.
Option (b) is incorrect because it includes statement 2, which is false.
Option (d) is incorrect because it excludes statement 1, which accurately describes the operational spectrum of VLC.