Optics Question 485
Question: If the luminous intensity of a 100 W unidirectional bulb is 100 candela, then total luminous flux emitted from the bulb is
[AIIMS 1998]
Options:
A) 861 lumen
B) 986 lumen
C) 1256 lumen
D) 1561 lumen
Show Answer
Answer:
Correct Answer: C
Solution:
$ \varphi =4\pi L $
$ =4\times 3.14\times 100 $ = 1256 lumen.
