Light as Waves, Rays and Photons. Geometric Optics. Optical Instruments. Periodic and Non-Periodic Waves. Electromagnetic Waves. Polarization of Light. Interference and Fraunhofer Diffraction. Fresnel Diffraction. Interference by Division of Amplitude. The Diffraction Grating and Its Applications. Interferometry: Length and Angle. Prism and Grating Spectrometers. High Resolution Spectrometry. Coherence and Correlation. Lasers. Semiconductors and Semiconductor Lasers. Laser Light. Fibre Optics. Holography. Radiation, Scattering and Refraction. The Detection of Light. Optics and Photonics in Nature. Appendix. Solutions to Numerical Examples. Solutions to Problems. Index.