A frequencyThe frequency describes the number of oscillations per second and is given in the unit Hertz (Hz). An oscillation passes through various points: The starting point, the maximum point, the... band refers to a specific range of frequencies within the electromagnetic spectrum. It is defined by an upper and lower cut-off frequencyThe frequency describes the number of oscillations per second and is given in the unit Hertz (Hz). An oscillation passes through various points: The starting point, the maximum point, the.... Each frequencyThe frequency describes the number of oscillations per second and is given in the unit Hertz (Hz). An oscillation passes through various points: The starting point, the maximum point, the... band has different characteristics and applications.