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What meant by one candela? And Which bas...

What meant by one candela? And Which base quantity is measured by this unit? (or) Define one candela (S.I standard for Luminous intensity)

Text Solution

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The SI unit for Luminous intensity is candela.
its symbol is cd
Definition:
One candela is the luminous in a given direction, of a source that emits monochromatic radiation of frequency `5.4xx10^(14)` Hz and that has a radiant intensity of `1/638` watt/steradian in that direction.
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