The constraints of the organization for human sight
Not only the human eyes are incapable of seeing the fundamental essence of light, but also there are regular rays of the sunlight that the human’s eyes cannot see. When scientists refracted the light into seven main spectrums of colors, namely violet, indigo, blue, green, yellow, orange, and red, they realized that there are other rays beyond violet that are gradually moving towards higher densities. These powerful lights are called ultraviolet. Moreover, they also discovered that there are lights beneath red with smaller wavelengths. The human eye is merely capable of seeing those seven general colors, and what is beyond violet and beneath red is invisible to our eyes. For this reason, those rays are called ultraviolet and infrared, and human beings have been capable of utilization those rays using specialized equipment.