Question

The candela is the luminous intensity in a given direction due to a source, which emits monochromatic radiation of

frequency _________ Hz and of which of the radiant intensity in that direction is 1/683 watt per station.

a) 520 x 1023 b) 540 x 1015 c) 540 x 1012 d) 520 x 109​

Answer 1

Answer:

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