sentences: a wave of sound is a mean of preposition & sail is a public of a water or an preposition & sound is a mean of water ->  speed is a property of the light wave and a particle of light  sound is a mean of water & 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  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