Color Vision Lab: stare at the black triangle within the yellow circle for 30 se
ID: 3510141 • Letter: C
Question
Color Vision Lab: stare at the black triangle within the yellow circle for 30 seconds. Then move your gaze to the black square to the right. YouMost people see a blue circle when they look at the square after staring at the yellow circle. Explain why this phenomenon occurs in terms of the sensitivity of the different types of cones. Color Vision Lab: stare at the black triangle within the yellow circle for 30 seconds. Then move your gaze to the black square to the right. You
Most people see a blue circle when they look at the square after staring at the yellow circle. Explain why this phenomenon occurs in terms of the sensitivity of the different types of cones.
Most people see a blue circle when they look at the square after staring at the yellow circle. Explain why this phenomenon occurs in terms of the sensitivity of the different types of cones. Most people see a blue circle when they look at the square after staring at the yellow circle. Explain why this phenomenon occurs in terms of the sensitivity of the different types of cones.
Explanation / Answer
According to the opponent process theory, the visual signals obtained through the rods and cones are interpreted in an antagonistic manner. The long (L), medium (M) and short (S) type of cones show overlap in the wavelengths to which they respond.
The three opponent channels proposed by the opponent theory are,
A response to one colour in an opponent pair is antagonistic to the other colour and is never perceived together, means there is no bluish yellow, etc.
If an individual continuously looks at a particular image, the color receptors that perceive specific colours become fatigue and continue to reflect all the wavelengths and identify the opponent colors on a white paper (i.e. red in place of green, blue in place of yellow, and black in place of white), these are called “afterimages.” The same happened in the given case.
Thus, the eyes play tricks on our brain. This phenomenon is also helpful to prevent the retinal damage and also to understand the colorblindness.