This textbook provides a comprehensive and thorough coverage of optics. It employs a balance of theory and instrumentation, providing the student with a classical background with historical anecdotes and citations. It incorporates current advances from lenses and lasers to telescopes and fibres. Additional problems are provided, designed to develop analytical skills. A more complete low-level discussion of superposition principle is included, as well as an introductory section on phasors and the addition of waves.