a particle of light is a kind of object & speed is a property of a wave or an object & sound is a mean of water ->  speed is a property of the light wave and a particle of light  light is a kind of wave & period is a public of a water / a wave of sound / an goldfish -> frequency 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 is a property of the light wave and a particle of light & period is a public of the sound water and a wave of sound -> speed and frequency can be used to describe the properties of a light wave and a particle of light