If it was particle, but not a wave, then we could not have radio<i>waves</i>, micro<i>waves</i>, ELF, VLF, and the like.<br /><br />If it was wave, but not a particle, we would not have, UV <i>rays</i>, x<i>rays</i>, gamma <i>rays</i>.<br /><br />Light covers the electromagnetic spectrum from waves to rays, from low energy light to high energy light.<br /><br />Large particles are a manifestation of small waves, and large waves are manifestation of small particles. A particle then, is merely a source or sink for waves. A wave then, is anything other than a source or sink for particles.