SATHEE: Optics Question 485

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.

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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

Options:

Answer:

Solution:

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