Optics Question 484
Question: Total flux produced by a source of 1 cd is
[CPMT 2001]
Options:
A) $ \frac{1}{4\pi } $
B) $ 8\pi $
C) $ 4\pi $
D) $ \frac{1}{8\pi } $
Show Answer
Answer:
Correct Answer: C
Solution:
Luminous intensity $ L=\frac{\varphi }{4\pi } $
$ \Rightarrow 1=\frac{\varphi }{4\pi }\Rightarrow \varphi =4\pi $ .