In Einstein's Photon Theory of Light, he proposed that light consists of distinct chunks or distinct packets of energy called photon and the energy of a photon is given by :
$E=hν$
where $ν$ is the frequency of light. I have a question. Einstein said that light is made up of particles called photons. But at the same time he is also saying that $E=hν$. In this equation, there is frequency which is clearly a characteristic of a wave. How is he associating property of a wave to a particle? How can a photon have frequency? It is a particle, right? It doesn't make sense. It is like he is combining wave and particle to create hybrid between the two. Can someone please explain this?