Question

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

• A. 8 $\pi$ lumen
• B. 16 $\pi$ lumen
• C. 4 $\pi$ lumen
• D. $\pi$ lumen

Answer 1

Answer: (A)

Intensity $I=2$ candela
Hence, flux is given by $F=4\pi l=4\pi \times 2=8\pi$ lumen