The dual (wave-particle) nature of light is discussed clearly in this and preceding chapters. The wave nature of light is seen in phenomena such as diffraction, interference and polarisation. On the other hand, in phenomena such as Compton effect and the photoelectric effect that involve energy-momentum transfer, radiation behaves as a particle known as the photon. Study about Einstein’s photoelectric equation and De-Broglie’s Hypothesis in this chapter. Find here the CBSE class 12 physics revision notes for chapter 11 dual nature of radiation and matter that helps in the revision of this chapter.