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: Concept Clarification:
This question concerns the types of cone cells proposed by the Young-Helmholtz trichromatic theory of color vision. This theory posits that color perception arises from the integrated activity of three distinct photoreceptor cell types (cones).
Step 2: Detailed Explanation:
The trichromatic theory identifies three types of cones in the human eye, each maximally sensitive to a specific range of light wavelengths:

Short-wavelength cones (S-cones): Primarily respond to blue light. (B is correct).
Medium-wavelength cones (M-cones): Primarily respond to green light. (D is correct).
Long-wavelength cones (L-cones): Primarily respond to red light. (C is correct).
All other color perceptions are generated by the relative stimulation levels of these three cone types. The theory does not propose a dedicated yellow cone (A is incorrect). Yellow is perceived when both red and green cones are stimulated.
Step 3: Conclusion:
The trichromatic theory encompasses blue, red, and green cones. Consequently, the correct option comprises B, C, and D exclusively.