Question

In the trichromatic theory of color vision, which of the following cones has been included?
A. Yellow cones
B. Blue cones
C. Red cones
D. Green cones
Choose the correct answer from the options given below:

• A. A, B and D only
• B. A, B and C only
• C. A, B, C and D
• D. B, C and D only

Hint:

Remember the primary colors of light: Red, Green, and Blue (RGB). The trichromatic theory is based on these three primary colors, corresponding to the three types of cones.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
The question asks about the types of cone cells proposed by the Young-Helmholtz trichromatic theory of color vision. This theory suggests that our ability to perceive color is based on the combined activity of three different types of photoreceptor cells (cones).
Step 2: Detailed Explanation:
According to the trichromatic theory, the human eye has three types of cones, each sensitive to a different range of light wavelengths:

Short-wavelength cones (S-cones): Respond most to light that we perceive as blue. (B is correct).
Medium-wavelength cones (M-cones): Respond most to light that we perceive as green. (D is correct).
Long-wavelength cones (L-cones): Respond most to light that we perceive as red. (C is correct).
The perception of all other colors is created by the relative levels of stimulation of these three cone types. The theory does not include a specific cone for yellow (A is incorrect). The sensation of yellow is produced when both red and green cones are stimulated.
Step 3: Final Answer:
The trichromatic theory includes blue, red, and green cones. Therefore, the correct option includes B, C, and D only.