People in general seem to have a weak understanding of electromagnetism, and they vacillate between ignoring it and fearing it. I have friends who will turn on

People in general seem to have a weak understanding of electromagnetism, and they vacillate between ignoring it and fearing it. I have friends who will turn on a radio and listen to their favorite station and they were unaware that the radio waves going to their radio were also hitting them. When I explained this to them, they seem surprised. I wasn't able to quite explain to them that an AM radio wave coming from several miles away was extremely weak and extremely unlikely to ever do them any damage.