Do Isomers or Metamers have identical light wavelengths?

In the context of light and color perception, isomers and metamers have different meanings. Isomers refer to compounds that have the same molecular formula but differ in the arrangement of atoms. They do not necessarily produce the same light wavelengths when observed.

On the other hand, metamers are two stimuli that may be composed of different spectral power distributions but appear identical in color to the human observer under specific lighting conditions. This means that while the metamers have different spectral properties, they can exhibit identical wavelengths of light when matched in terms of color perception.

Given this understanding, the correct answer focuses on metamers. Metamers indeed can have different wavelengths but still appear the same because of the way our visual system interprets them. Therefore, while isomers can't produce identical light wavelengths due to their structural differences, metamers can result in the same perceived color despite differing in their actual wavelengths. Thus, the correct understanding should center around metamers being associated with identical perceptions of light wavelengths.