Respuesta :
It is the RGB system. It makes colors by mixing the right amounts of red, green, and blue light. Here it mixed only red and blue.
Answer:
It is the RGB system of a spectrogram
Explanation:
The RGB system of a spectrogram makes colors by mixing the right amounts of light which is red, green, and blue light but here it mixed only red and blue. Its just like mixing paint just replace paint with light.