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# Note for ENGINEERING PHYSICS - EP by Manju V V Shetty

• ENGINEERING PHYSICS - EP
• Note
• Visvesvaraya Technological University Regional Center - VTU
• 8 Topics
• 8615 Views
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Subject: Engineering Physics Subject code: 15PHY12/22 Semester: I/II

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2 Content: Module Name of the module Page Number Module 1 Modern Physics and Quantum Mechanics 3-35 Module 2 Electrical Properties of Materials 36-67 Module 3 Lasers and Optical Fibers 68-108 Module 4 Crystal Structure 109-137 Module 5 Shock waves and Science of Nano Materials 138-160 Lab Viva voce question of Lab 161-176 Q. P Previous years Question papers 177 : : Engineering Physics Manju V V, Asst.Prof, Dept of Physics, VVCE, Mysuru

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3 Module –1 Modern Physics and Quantum Mechanics: Black body radiation spectrum, Assumptions of quantum theory of radiation, Plank’s law, Weins law and Rayleigh Jeans law, for shorter and longer wavelength limits. Wave Particle dualism, DE Broglie hypothesis. Compton Effect. Matter waves and their Characteristic properties, Definition of Phase velocity and group velocity, Relation between phase velocity and group velocity, Relation between group velocity and particle velocity. Heisenberg’s uncertainty principle and its application, (Nonexistence of electron in the nucleus). Wave function, Properties and physical significance of wave function, Probability density and Normalization of wave function. Setting up of one-dimensional time independent Schrodinger wave equation. Eigen values and Eigen functions. Application of Schrodinger wave equation for a particle in a potential well. 10 Hours Engineering Physics Manju V V, Asst.Prof, Dept of Physics, VVCE, Mysuru

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4 Module –1 Modern physics and quantum mechanics Introduction: The revolution of physics starts from the 20th century. Max Planck explained the black body radiation in the year of 1900, according to him every body can absorb in quanta of energy E = hν Where h is the planks constant (6.624 X 10-34 J/Hz) and ν is the frequency Black body radiation spectrum:  The term black body was introduced by Gustav Kirchhoff in the year of 1860.  A perfect black body is one which absorbs the radiation of all wavelengths incident on it.  The nature of the black body radiation depends on temperature.  Wien studied that, when a perfect black body is heated to higher and higher temperature, it emits radiation of all possible wavelength, this radiation is called black body radiation.  Since the true black body doesn’t exist, in the year of 1895 two physicists Lummer and Wien designed a special type of black body, by heating it they measured the intensity of radiation corresponding to different wavelength. The result they have shown in a graph as follows.. From the graph, 1. For different temperature, there are different curves. The spectral distribution of energy in the radiation depends only on the temperature of the black body. 2. The higher the temperature, the greater the amount of total radiation energy emitted and also energy emitted at individual wavelength. 3. The higher the temperature, the lower the wavelength at which maximum emission occurs. Engineering Physics Manju V V, Asst.Prof, Dept of Physics, VVCE, Mysuru