What is the peak photoreceptor absorption spectra of a rod?

What is the peak photoreceptor absorption spectra of a rod?

• A. 507 nm
• B. 426 nm
• C. 530 nm
• D. 557 nm

Answer: (A)

The peak photoreceptor absorption spectra of rods is at 507 nm, which corresponds to a sensitivity in the blue-green range of light. Rods are responsible for vision in low-light conditions and are more sensitive to light than cones, which are responsible for color vision and function best in brighter conditions. The 507 nm peak reflects the area of the spectrum where rod photopigments (specifically rhodopsin) are most effective in absorbing light, allowing for optimal visual perception in dim environments. This sensitivity to the blue-green wavelengths enhances night vision and contributes to the ability to detect light levels in various conditions. Understanding this peak is essential for comprehending how visual systems operate under varying light conditions.

The peak photoreceptor absorption spectra of rods is at 507 nm, which corresponds to a sensitivity in the blue-green range of light. Rods are responsible for vision in low-light conditions and are more sensitive to light than cones, which are responsible for color vision and function best in brighter conditions. The 507 nm peak reflects the area of the spectrum where rod photopigments (specifically rhodopsin) are most effective in absorbing light, allowing for optimal visual perception in dim environments. This sensitivity to the blue-green wavelengths enhances night vision and contributes to the ability to detect light levels in various conditions. Understanding this peak is essential for comprehending how visual systems operate under varying light conditions.