Models of the coupling of electromagnetic and gravitational fields have been studied extensively for many years.In this paper,we consider the coupling between the Maxwell field and the Weyl tensor of the gravitational field to study how the wavevector of the electromagnetic wave is affected by a plane gravitational wave.We find that the wavevector depends upon the frequency and direction of polarization of the electromagnetic waves,the parameter that couples the Maxwell field and the Weyl tensor,and the angle between the direction of propagation of the electromagnetic wave and the coordinate axis.The results show that this coupling model can be tested by the detection of high-frequency gravitational waves.