eli5: If the human eye can only see 10 million colors, how do we know there are 18 decillion colors in the universe in total.

Question

eli5: If the human eye can only see 10 million colors, how do we know there are 18 decillion colors in the universe in total.

In: Biology

Answer 1

The human eye is not perfect enough to see all colors and visions, almost like the camera is not as good as the human eye.

Due to experiments with animals, it is determined that some animals can see colors that the human eye cannot detect. For example, the eyes of insects have UV vision, while snakes, some fish, and frogs see with infrared vision.

This means that those animals cannot see the colors that the human eye can detect. Therefore, it is assumed that these animals can see other colors that the human eye cannot detect.