Choose the correct description of what do we mean when we say that light is an electromagnetic wave and the relationship among wavelength, frequency, and speed for light waves. choose the correct description of what do we mean when we say that light is an electromagnetic wave and the relationship among wavelength, frequency, and speed for light waves. we say that light is an electromagnetic wave because light is a oscillation of electric and magnetic fields. frequency=speedoflightwavelength we say that light is an electromagnetic wave because light is a motion of electric and magnetic fields. frequency=speedoflightwavelength we say that light is an electromagnetic wave because light is a oscillation of electric and magnetic fields. frequency=wavelengthspeedoflight we say that light is an electromagnetic wave because light is a motion of electric and magnetic fields. frequency=wavelengthspeedoflight