A quarter-wave monopole radio antenna (also called a Marconi antenna) consists of a long conductor of one quarter the length of the transmitted wavelength. The lower end of the antenna is connected to a conducting ground plane (often simply the Earth) which reflects the transmitted signal, creating an effective antenna length of a half wavelength. (a) What must be the height of the antenna (in m ) for a radio station broadcasting at 509 kHz? m (b) What must be the height of the antenna (in m) for radio stations broadcasting at 1,500 kHz? m