A) \[\frac{1}{4\pi }\]
B) \[8\pi \]
C) \[4\pi \]
D) \[\frac{1}{8\pi }\]
Correct Answer: C
Solution :
Luminous intensity \[L=\frac{\varphi }{4\pi }\]\[\Rightarrow 1=\frac{\varphi }{4\pi }\Rightarrow \varphi =4\pi \].
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