UPSC PRELIMS · GEOGRAPHY · SCIENCE & TECHNOLOGY — VISIBLE LIGHT COMMUNICATION
With reference to Visible Light Communication (VLC) technology, which of the following statements are correct? 1. VLC uses electromagnetic spectrum wavelengths 375 to 780 nm. 2. VLC is known as long-range optical wireless communication. 3. VLC can transmit large amounts of data faster than Bluetooth. 4. VLC has no electromagnetic interference. Select the correct answer using the code given below:
Take a breath. Choose one. Press A–D on your keyboard if you like.
EXPLANATION
VLC uses visible wavelengths, can provide high data rates and is relatively immune to radio-frequency electromagnetic interference; it is not a long-range technology.
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