X-rays, Dual Nature of Matter, Failure of Classical Physics and Success of Quantum Approach

After reading this chapter the reader is expected to: (i) understand the method of producing X-rays, their properties and applications, (ii) be able to grasp the concepts of the dual nature of matter, energy and matter waves, (iii) appreciate the pitfalls of classical theories of physics in explaining some important experimental observations and how the quantum approach is able to explain them.