The Visible Light Magic Window sees the same part of the spectrum as our eyes see. Visible waves are a little shorter than the size of a bacterium. This is planet Jupiter. If you looked through a very good telescope you would see Jupiter like this. The Hubble Space Telescope in Earth orbit sees very far and very faint objects in the visible part of the spectrum, as well as the ultraviolet.
By the way, in the visible light range of the electromagnetic spectrum are the separate smaller ranges that our eyes see as different colors. A prism separates white light into its different wavelengths. White light goes in, all the colors of the rainbow come out. In the visible range, red has the longest wavelength, while violet has the shortest.