"My city is on television."
Translation:Meine Stadt ist im Fernsehen.
good question. der Fernseher is the TV set, the technical device. das Fernsehen is the television medium. both use the same word TV in english, hence the confusion. so, for example, when u say, "what's on tv tonight?" or "it was shown on national television", u mean das Fernsehen. when u say, "i bought a new tv", or "i kept the magazines on top of the tv", u mean der Fernseher. das Fernsehen mite also mean the act of watching tv in general, as in "watching tv is bad. hope that cleared it up.