a particle of light is a kind of object & speed is a property of a wave or an object & light is a kind of wave ->  speed is a property of the light wave and a particle of light  light is a kind of wave & frequency is a property of a wave / a particle of light / an event ->  frequency is a property of the light wave and a particle of light  speed is a property of the light wave and a particle of light & frequency is a property of the light wave and a particle of light -> speed and frequency can be used to describe the properties of a light wave and a particle of light