A visual pigment may absorb two wavelengths equally, but even though their photons contain different energies, the cone cannot tell them apart, because they both cause the retinal to change shape and thus trigger the same molecular cascade leading to exci
A visual pigment may absorb two wavelengths equally, but even though their photons contain different energies, the cone cannot tell them apart, because they both cause the retinal to change shape and thus trigger the same molecular cascade leading to exci
同一个视色素可能对两种不同波长的吸收能力一样好，但即使这两种波长的光子能量不同，锥细胞也无法将之区分开来，因为这两种光都会改变视黄醛的形状，因而引发同样的分子事件，造成锥细胞的兴奋。