Iran-backed Huthi rebels in Yemen said Sunday they attacked a US aircraft carrier group in the Red Sea a day after a wave of air strikes the White House said killed senior rebel leaders. "In response ...

A radio wave of a specific frequency that is modulated or changed in some way in order to transmit data. The amplitude of the carrier wave can be increased—for example, to indicate a one or zero of ...

FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...