With reference to visible light communication (VLC) technology, which of the following statements are correct? 1. VLC uses electromagnetic spectrum wavelengths 375 to 780nm 2. VLC is known as long-range optical wireless communication 3. VLC can transmit l

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Q: (IAS/2020)
With reference to visible light communication (VLC) technology, which of the following statements are correct?
1. VLC uses electromagnetic spectrum wavelengths 375 to 780nm
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

question_subject: 

Science & Technology

question_exam: 

IAS

stats: 

0,84,117,66,19,84,32

keywords: 

{'visible light communication': [0, 0, 0, 1], 'optical wireless communication': [0, 0, 0, 1], 'electromagnetic spectrum wavelengths': [0, 0, 0, 1], 'vlc': [0, 0, 0, 1], 'electromagnetic interference': [0, 0, 0, 1], 'bluetooth': [0, 0, 0, 2], 'range': [5, 0, 6, 7]}

The correct answer is (c) 1, 3 and 4 only.

Explanation:

VLC uses electromagnetic spectrum wavelengths 375 to 780nm: This statement is correct. Visible light communication (VLC) uses the visible light portion of the electromagnetic spectrum, which ranges from 375 to 780 nanometers.

VLC is known as long-range optical wireless communication: This statement is incorrect. VLC is a short-range optical wireless communication technology.

VLC can transmit large amounts of data faster than Bluetooth: This statement is correct. VLC has the potential to transmit data at higher speeds than Bluetooth, as it can use a wider bandwidth of frequencies.

VLC has no electromagnetic interference: This statement is correct. VLC uses visible light, which does not interfere with radio frequency (RF) signals or cause electromagnetic interference (EMI).