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 $ .



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