Two electromagnetic waves, A and B, travel in space, A with a frequency double that of B. We can conclude that the speeds of the waves are the same, but the wavelength of A is double the wavelength of B. the speeds of the waves are the same, and so are the wavelengths. the wavelengths of the waves are the same, but the speed of A is double the wavelength of B. the speeds of the waves are the same, but the wavelength of A is half the wavelength of B. the wavelengths of the waves are the same, but the speed of A is half the wavelength of B. both speed and wavelength are the same for both waves