A laboratory manual for high schools, colleges, and universities. The second edition contains more than 14 experiments and demonstrations presented in ten chapters: Introductory Experiments (3), Mechanics (11), Molecular Physics (11), Electricity and Magnetism (13), Optics and Atomic Physics (12), Condensed Matter Physics (11), Semiconductors (1), Applied Physics (11), Nobel Prize Experiments (1), and Student Projects (25). All the experiments are illustrated through the results of real measurements. New experiments developed by the author in 27-214 are added to this edition.