<html> <head> <meta content="text/html; charset=ISO-8859-1" http-equiv="Content-Type"> </head> <body text="#000000" bgcolor="#FFFFFF"> <font face="Arial">Yes indeed. Neither infrared nor ultraviolet are light.  Even scientists often speak of "ultraviolet light" but it is sloppy to do so.  "Light" is the name given to the (humanly) visible part of the electromagnetic spectrum.  Infrared and ultraviolet are both just beyond the range of what is humanly visible</font>, infrared too long wavelength and ultraviolet too short.  The human eye responds to wavelengths of approx. 400-700 nanometers.<br> <br> I am loving this discussion too!<br> <br> Best regards,<br> <br> David.<br> <br> <div class="moz-cite-prefix">On 12/12/2012 16:03, <a class="moz-txt-link-abbreviated" href="mailto:pianotech-request@ptg.org">pianotech-request@ptg.org</a> wrote:<br> </div> <blockquote cite="mid:mailman.4389.1355328183.4133.pianotech@ptg.org" type="cite"> <div><br> </div> I think it would be accurate to say that Infrared is a form (spectrum range) of electromagnetic radiation, not of "light" because you can't actually SEE it (it's in frequencies just lower – wavelengths just longer – than human eyes can detect). <div><br> </div> <div>This is a great discussion, please keep it up, I may be learning something here.</div> <div><br> </div> </blockquote> <br> </body> </html>