Answer questions: What is the phenomenon of metamerism?

Spectral reflection curves are different, but a pair of objects with the same color coordinates under a certain condition (specific illumination body, specific observer) is defined as a homochromatic object, or a conditional color pair. It said that the phenomenon of homogeneity was observed. The degree of homogeneity depends on the difference in spectral reflectance of the object pair and the specific light source and observer. Therefore, the color of the object is related to the spectral power distribution of the reflected (transmitted) light, but it is not a one-to-one correspondence. Therefore, many light energy with different spectral distributions cause the same color sensation in the human eye, that is, the phenomenon of color mixing is different. Metamerism is caused by the low resolving power of the human eye. From the perspective of color application technology, the same viewing angle response can be produced due to different spectral stimuli. Therefore, matching of colors can be obtained without using the same material. The same color phenomenon can be used to replace toxic pigments with non-toxic pigments, and inexpensive pigments can be used instead of expensive pigments for color reproduction.