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:

QUESTION

Medium

Science & Technology

Prelims 2020

With reference to Visible Light Communication (VLC) technology, which of the following statements are correct?

VLC uses electromagnetic spectrum wavelengths 375 to 780 nm.
VLC is known as long-range optical wireless communication.
VLC can transmit large amounts of data faster than Bluetooth
VLC has no electromagnetic interference.

Select the correct answer using the code given below:

Select an option to attempt

Explanation

Statement 1 is correct. Visible Light Communication (VLC) utilizes the electromagnetic spectrum within the visible light range, which is roughly between 375 nm (violet) and 780 nm (red).

Statement 2 is incorrect. VLC is not considered long-range communication compared to other optical wireless technologies like fibre optics. Its range is typically limited to shorter distances due to factors like signal power and signal degradation.

Statement 3 is correct. VLC has the potential to transmit large amounts of data at high speeds, often faster than Bluetooth technology, especially in scenarios where high data transfer rates are required.

Statement 4 is also correct. VLC does not use radio frequencies (RF) like traditional wireless communication technologies, and therefore, it does not suffer from electromagnetic interference (EMI) that can affect RF-based systems.

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