ल्यूमेन एकक है - – McqOptions

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1.	ल्यूमेन एकक है -
A.	ज्योति फ्लक्स का
B.	चमक का
C.	ज्योति तीव्रता का
D.	ज्योति घनत्व का
Answer» B. चमक का

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