Light is a form of electromagnetic radiation, just like radio...</div><div class=gmail_extra><br><br><div class=gmail_quote>On Fri, Jan 24, 2014 at 4:15 PM, Elizabeth Phelps <span dir=ltr><<a href=mailto:lizphelps18@aol.com target=_blank>lizphelps18@aol.com</a>></span> wrote:<br>