PART_8 WHAT IS QUANTUM THEORY AND PHOTON?Quantum Theory: The quantum theory of light was proposed by Einstein, It states that light travels in bundles of energy, and each bundle is known as a photon.What is quantum theory?Quantum theory is the theoretical basis of modern physics that explains the nature and behavior of matter and energy on the atomic and subatomic level.What is the theory of the photon?According to the photon theory of light, we can summarize the properties of photons as. Each photon has momentum p (= h ν/c), energy, E (=hν) and speed c, the speed of light. Photons are electrically neutral, and are not deflected by electric and magnetic fields.What are the three quantum theories?The three themes of quantum theory—the quantization of energy and the probabilistic behavior of energy quanta, the wave–particle nature of some matter, and Planck's constant—formed an interrelated set of ideas that lacked a universality and coherence necessary for them to constitute a scientific theory.Well!! Thanks for all!!!