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Krishna Sharma • 46.84K Points
Coach Science
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Q. ल्यूमेन (Lumen) किसका मात्रक है ?

(A) ज्योति तीव्रता का
(B) ज्योति फ्लक्स का
(C) A तथा B दोनों
(D) इनमें से कोई नहीं
Correct Answer - Option (B)

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