Purkinje phenomenon

Japanese: プルキンエ現象 - プルキンエげんしょう

A phenomenon in which short wavelength colors such as blue and green appear brighter and long wavelength colors such as red appear darker when it gets dark. For example, the green of plants appears brighter at twilight. It was first described by JE Purkinje of Czechoslovakia. It occurs when the activity of the cones, which are highly sensitive to long wavelength light, becomes weaker and the activity of the rods, which are highly sensitive to short wavelength light, becomes stronger.

Source : Heibonsha Encyclopedia About MyPedia Information

Japanese:

暗くなると，青や緑などの短波長色が明るく見え，赤などの長波長色が暗く見える現象。たとえば薄暮時には草木の緑色があざやかに感じられる。チェコスロバキアのJ.E.プルキンエが初めて記載。網膜の視細胞のうち，長波長の光に対して高い感度をもつ錐体の働きが鈍くなり，逆に短波長の光に対して高い感度をもつ杆体(かんたい)の働きが強くなるために起こる。

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