Light which provides beauty to the world and makes the world colourful, is still mysterious for science. According to some genius, it behaves like a particle. And from other it behaves like wave. What is a light? How does it travel? What is it rec...

Light which provides beauty to the world and makes the world colourful, is still mysterious for science. According to some genius, it behaves like a particle. And from other it behaves like wave. What is a light? How does it travel? What is it received? How does it behave when passes through different media? These questions tested the genius. Galileo, Newton, Huygens, Young, Maxwell, Einstein, Max Planck and Heinrich Hertz, Among several others are those genius Who tried to solve the mystery of light.     This book is only an approach to provide clear concept for all the queries about light. Corpus theory of light was proposed by Sir Isaac Newton which was strongly proved by Max Planck by black body radiation. Heinrich Hertz also showed the photo electric effect of light. On the other side, Huygens gave the wave theory of light. This nature of light was strongly proved by Youngs  by his interference experiment. According to Maxwell. Light is an electromagnetic wave that can propagates through vacuum. Heinrich Hertz also provided the evidence of presence of electromagnetic waves by a series of experiments.   Still the science is under doubt and follow the wave - particle duality of light. In this prospects, with something it behaves like particle, while with other it behaves like wave. In photo electric effect, its behaviour is like a particle. Interference, polarization of light and diffraction are the phenomena which are proved only by the wave nature of light. But how is it possible? Is it possible? If possible, in what condition it behaves like particle and in what condition it behaves like wave?     With the book it is easier to get the answer of all these questions. Light shows number of phenomena like formation of rainbow, dispersion of light, reflection of light, refraction of light, diffraction of light, formation of shadows, polarization, interference, photoelectric effect, and so on. All of the phenomena are easily explained by the book “The Last Theory of Light.” It is only an approach of the author in this field. He does not claim for anything.