then how do my wireless ethernet adaptors work when one is inside my locker, which has no holes (or openings)? :) >>The holes wouldn't appear to be holes if they were the size of >>microwaves... Waves at 100MHz are only about 2.8 meters apart. Now take >>in account that microwaves operate at about 2,500MHz. > >The holes at 2.5GHz are 12 centimeters. > >--Brian