
The human eye can perceive light. But only when it has a wavelength between approximately 380 nanometers (seen as violet) and 750 nanometers (seen as red). But these light rays are only a small fraction of the very broad spectrum of rays that exist, from 0.0001 nanometers in wavelength to a full meter. This covers Gamma rays, x-rays, ultraviolet, infrared, microwaves, and radio waves — none of which the human eye can perceive.
But this is not a science lesson — what does it have to do with Geuloh?
We will see that it is a basis for understanding how the Rebbe can say that the Geuloh is here, all the end times have passed, and yet we remain in golus. On the face of it, there is no logical basis to say that Continue reading