Why does a film shot and projected at 16 fps exhibit greater flicker than a film shot and projected at 24 fps?

Question

Quizplus · Accepted Answer

Persistence of vision and critical flicker fusion require rapid projection, meaning that the faster the frame rate, the less flicker is perceived by the human eye. Since 24 fps is a faster frame rate than 16 fps, a film shot and projected at 24 fps will exhibit less flicker than one shot at 16 fps. The choices A and B are incorrect since the motion speed does not directly affect flicker perception. The choice C is also incorrect since the definition of the film does not necessarily affect flicker perception.

Why Does a Film Shot and Projected at 16 Fps