From Jay Pasachoff, Williams College
The low level of radio noise introduced across the spectrum by ultra-wideband (UWB), described in Danny O’Brien’s article may be too low for most users to notice (24 April, p 28). Radio astronomers, however, study the faintest possible radio radiation from space. Widespread use of UWB would be devastating for radio astronomy, and I sincerely hope that the idea founders on this unchangeable consequence.
Williamstown, Massachusetts, US
