This book ¿Physics by Experiments¿ is prepared specially for under graduate Courses & first year Engineering Courses of various Universities. This book covers Diffraction Grating, Transistor Characteristics, Verification of Stefan¿s law, Zener Diode Characteristics, Series & Parallel LCR Circuit, Electrical Resistivity by Four Probe method, Fermi Energy, Dielectric Constant, Energy gap of Semiconductor diode, Planck¿s Constant using LED¿s, B-H Curve, Ultrasonic Interferometer, Photo Diode Characteristics, Torsion Pendulum, Uniform Bending, Newton¿s Rings, Black Box. These experiments are directly and indirectly connect the under graduate Courses and technical courses.