7/29/2011 2:50:04 PM
light waves
7/29/2011 2:58:43 PM
light particles
7/29/2011 3:05:47 PM
THEY'RE MASSLESS BUT HAVE MOMENTUM!HOW DOES THAT WORK?THEM SCIENTISTS THEY LYING TO US!
7/29/2011 3:15:21 PM