[ATM] Wavelengths of light

[Francis J. O'Reilly]

I notice that green, the chosen color for testing optics on this list is about in the middle of the visible spectrum of light as far as wavelengths go. I understand that when we refer to correctiion in terms of wavelengths of light we are referring generally to wavelengths of green light. Is that standard promulgated anywhere? Has anyone here tried otehr colors such as purple, a much shorter wavelength? Or red a much longer wavelength?

Just the curious wonderings of a non optical professional.

Francis J. O'Reilly