Luminous energy emitted by an extended light source is measure in which units?

Question

Quizplus · Accepted Answer

Radiant flux is the measure of the total luminous energy emitted by a light source and is typically measured in watts. Candelas measure luminous intensity, which is the amount of light emitted in a specific direction. Trolands measure the retinal illuminance, which is the amount of light that enters the eye and is focused on the retina. Therefore, the correct answer is (C) radiant flux.

Luminous Energy Emitted by an Extended Light Source Is Measure