Why is a candle flame yellow?
为什么蜡烛火焰是黄色的？
The perceived color of an object is determined by the spectrum (SPD) of its radiant flux factored by the luminous efficacy of the human eye.
物体的感知颜色由其辐射通量的光谱（SPD）与人眼的光效相乘决定。
If the human eye responded equally to all wavelengths in the visible range, the candle flame would appear red. But since the eye sensitivity peaks in the green and diminishes toward the red wavelengths, the eye perceives the color as yellow.
如果人眼对可见光范围内的所有波长都同样敏感，烛火将呈现红色。但因为人眼的敏感度在绿色波长处达到峰值，而在红色波长处逐渐降低，因此人眼感知的色彩为黄色。
| Color puzzles
颜色谜题 |
Vision concepts
Color vision concepts
索引视觉概念色彩视觉概念
HyperPhysics ***** 光与视觉
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