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.