What would the properties of an infinitely long wavelength of light be? And what about a wavelength of light that is infinitely short? What would that look like?
edit: light as in electromagnetic waves, not visible light. Sorry if it was not very clear
Now do the shortest possible wavelength. World-ending yes or no?
If I’m not mistaken, their last paragraph describes this to contrast the answer above about the longest (I.e. lowest) frequency.