The long-wavelength peak (L-cones) corresponds to which color range?

The long-wavelength peak (L-cones) corresponds to which color range?

• A. Green, 534-545 nm
• B. Blue, 420-440 nm
• C. Yellow, 590-610 nm
• D. Red, 564-580 nm

Answer: (D)

The long-wavelength (L) cone is most sensitive to light in the red part of the spectrum, with its peak sensitivity around 564–580 nm. In the classic three-cone model, S-cones peak near 420–440 nm (blue), M-cones near 534–545 nm (green), and L-cones near 564–580 nm (red). So the long-wavelength peak corresponds to red light, specifically about 564–580 nm. The other ranges align with blue or green cones, or lie outside the L-cone’s peak sensitivity.

The long-wavelength (L) cone is most sensitive to light in the red part of the spectrum, with its peak sensitivity around 564–580 nm. In the classic three-cone model, S-cones peak near 420–440 nm (blue), M-cones near 534–545 nm (green), and L-cones near 564–580 nm (red). So the long-wavelength peak corresponds to red light, specifically about 564–580 nm. The other ranges align with blue or green cones, or lie outside the L-cone’s peak sensitivity.