With reference to Visible Light Communication (VLC) technolo

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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 using the code given below:

??????? ???? ??????????? (VLC) ????? ?? ?????? ???, ?????????? ??? ?? ??? ?? ??? ??? ???

(1) VLC ??????? ???????? ?????????? ???? ??????? 375 ?? 780 ???? ?? ????? ???? ???

(2) ?????? ?? ???? ???? ?? ??????? ??????? ????? ?? ??? ??? ???? ???? ???

(3) VLC ??????? ?? ????? ??? ???? ?????? ??? ???? ??????? ?? ???? ??,

(?) ?????? ?? ??? ??????? ???????? ????????? ???? ???

???? ??? ?? ??? ?? ????? ???? ??? ?? ??? ????:

[UPSC CSE PRE 2020]

A 1, 2 and 3 only

केवल 1, 2 और 3

B 1, 2 and 4 only

केवल 1, 2 और 4

C 1, 3 and 4 only

केवल 1, 3 और 4

D 2, 3 and 4 only

केवल 2, 3 और 4

Answer: (c) Explanation: Visible Light Communication (VLC) systems employ ...

?????: (??) ??????????: ??????? ???? ??????????? (VLC) ?????? ????? ?? ???...

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