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<p>Light is made up of particles called photons and hence is inherently “grainy” (quantized). Quantum optics studies the nature and effects of light as quantized photons. The first indication that light might be quantized came from Max Planck in 1899 when he correctly modelled blackbody radiation. By assuming blackbody radiation is quantized Bohr showed that the atoms were also quantized in the sense that they could only emit discrete amounts of energy. The understanding of the interaction between light and matter following these developments not only formed the basis of quantum optics but was also crucial for the development of quantum mechanics as a whole. The book also dwells on the topics of Quantum Wave Theory nature of light Quantum Phenomenon of light Coherence Theory Geometric Optics generation of Quantum Optics and Quantum Laser Technology.</p>
