The perceptual threshold for vision is defined as the ability to detect ________ located _________ on a clear night.
A) a candle flame; 1 mile away
B) car headlight; 1 mile away
C) an emergency flare; 30 miles away
D) a candle flame; 30 miles away
E) a camp fire; 8 miles away

Question

Quizplus · Accepted Answer

The perceptual threshold for vision includes the ability to detect a candle flame 30 miles away on a clear night, showcasing the sensitivity of human vision under optimal conditions.

The Perceptual Threshold for Vision Is Defined as the Ability