All of these rays and waves are the same type of electromagnetic energy. They are different only because the length of their waves are different. When we see something by visible light, our eyes allow us to distinguish the light of different waves as different colors. The waves that are short are blue and the waves that are long appear as red. We can't really see the waves, we only see the colors that our mind creates to help us interpret the world.
Every color has a distinct wavelength.
Reddish colors begin at wavelengths of about 0.65 microns. Your eyes cannot see light that has a wavelength longer than 0.7 microns. Light with wavelengths from 0.7 micron to about 0.1 millimeter is called infrared light. The band of infrared light is a thousand times wider than that of visible light. All of it is invisible to our eyes.