100:00:04,705 --> 00:00:05,973"THE FORCE-CARRYINGPARTICLES200:00:06,006 --> 00:00:07,341"EXCHANGED BETWEENMATTER PARTICLES300:00:07,375 --> 00:00:09,310"ARE SAID TO BEVIRTUAL PARTICLES400:00:09,343 --> 00:00:10,744"BECAUSE,UNLIKE REAL PARTICLES,500:00:10,778 --> 00:00:12,046"THEY CANNOTBE DIRECTLY DETECTED6