A candle flame seen at 30 miles on a clear dark night is the smallest possible amount of light needed for a human to visually detect.This illustrates the _____ for human vision.

Question

Quizplus · Accepted Answer

The concept of the absolute threshold refers to the minimum amount of stimulation needed for a person to detect a sensory input half the time. In this case, the candle flame seen at 30 miles on a clear dark night represents the smallest possible amount of light that can be detected by a human, which is a clear example of the absolute threshold for human vision. The other options (B, C, and D) are not relevant to the concept of the absolute threshold in human perception.

A Candle Flame Seen at 30 Miles on a Clear