It was a typo, now corrected. I was suggesting, humorously, that 10nm light could be called both 'extreme uv' and 'underachieving xrays', since they overlap. Th

It was a typo, now corrected. I was suggesting, humorously, that 10nm light could be called both 'extreme uv' and 'underachieving xrays', since they overlap. The EM spectrum is continuous, so these distinctions and names are arbitrary, so why not have some fun?