Which cone type has its peak absorption at 557 nm?

Which cone type has its peak absorption at 557 nm?

• A. S cone
• B. M cone
• C. L cone
• D. Rod

Answer: (C)

The cone type that has its peak absorption at 557 nm is the M cone, which is specifically designed to absorb light in the green portion of the spectrum. The M cone, or middle-wavelength cone, is one of the three types of photoreceptors in the human retina, along with S cones (short-wavelength) and L cones (long-wavelength). While S cones peak around 420 nm and L cones peak at around 560 nm, it is the M cone that exhibits peak absorption at approximately 535-550 nm, which corresponds closely with the 557 nm value mentioned in your question. This peak absorption at the green wavelengths allows the M cones to play a crucial role in color discrimination and visual perception, particularly in differentiating between shades of green and red. The response of the M cones combined with the outputs from the other cone types provides the brain with the necessary signals to process color vision.

The cone type that has its peak absorption at 557 nm is the M cone, which is specifically designed to absorb light in the green portion of the spectrum. The M cone, or middle-wavelength cone, is one of the three types of photoreceptors in the human retina, along with S cones (short-wavelength) and L cones (long-wavelength). While S cones peak around 420 nm and L cones peak at around 560 nm, it is the M cone that exhibits peak absorption at approximately 535-550 nm, which corresponds closely with the 557 nm value mentioned in your question.

This peak absorption at the green wavelengths allows the M cones to play a crucial role in color discrimination and visual perception, particularly in differentiating between shades of green and red. The response of the M cones combined with the outputs from the other cone types provides the brain with the necessary signals to process color vision.