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<p><b>Contents- </b>Interference, Diffraction of Light, Polarization, X-Ray Diffraction, Laser, Fibre Optics, Solid State Physics, PN Junction Diode and Breakdown Diode, Electronics, Mathematical Physics, Thermodynamics, Air Compression, Steam Power Plant and Heat Transfer, Quantum Mechanics, Solved Papers (DU) 2018, Solved Papers (DU) 2019, Solved Papers (DU) 2020, Solved Papers (DU) 2021.</p>