How many wavelengths do the cones have?

How many wavelengths do the cones have?

• A. 2 wavelengths
• B. 4 wavelengths
• C. 3 wavelengths
• D. 5 wavelengths

Answer: (C)

The eye has three types of cone photoreceptors, each tuned to a different region of the spectrum. These cone classes provide three peak sensitivities: short-wavelength (blue), medium-wavelength (green), and long-wavelength (red) light. Although each cone type responds to a range of wavelengths, their peak sensitivities define three distinct wavelengths that contribute to our color vision. So, the cones collectively have three wavelengths of peak sensitivity. This is why color vision relies on a trio of cone types; missing one type would reduce color discrimination, and having more than three isn’t how human color vision is organized.

The eye has three types of cone photoreceptors, each tuned to a different region of the spectrum. These cone classes provide three peak sensitivities: short-wavelength (blue), medium-wavelength (green), and long-wavelength (red) light. Although each cone type responds to a range of wavelengths, their peak sensitivities define three distinct wavelengths that contribute to our color vision. So, the cones collectively have three wavelengths of peak sensitivity. This is why color vision relies on a trio of cone types; missing one type would reduce color discrimination, and having more than three isn’t how human color vision is organized.