Question

An isotropic source of $2$ candela produces a light flux equal to

• A. $2\pi$ lumen
• B. $4\pi$ lumen
• C. $6\pi$ lumen
• D. $8\pi$ lumen

Answer 1

Answer: (D)

Given, $L=2$ cd The light flux $\varphi =4\pi L$
$=4\pi \times 2$
$\varphi =8\pi$ lumen