The book has been thorougly revised and enlarged keeping in mind the latest syllabi of ugc, new delhi, 2001. The complete course in "Optics", as suggested in the ugc model curriculum for b.Sc physics . This book has been written for the students of b.Sc., physics of various universities. The book covers the syllabi, prescribed by madras, bharathiyar, bharathidhasan, madurai kamraj and manonmaniam sundaranar universities.Si systems of units has been throughout the text. Proper care has been taken in dealing with the subject with modern outlook. A large number of questions and problems have been given at the end of each chapter. Table of contents: 1.Geometrical optics2. Interface3. Diffraction 4. Polarisation of light5. Spectroscopy6. Matrix method in paraxial optics7. Coherence8.Fibre optics9. Holography10. Elecromagnetic waves11. Dispersion and scattering12. Lasers13. Interface -ii14. Fourier transforms and applications15. Diffraction of light -iii 16. Polarisation -ii17. Fermat's principle18. Huygens' principle and its applications19.Classical and modern geometrical optics20. Interface and diffraction of light21. Doppler effect in light and its application22. Cornu's spiral23. Lasers ii24. Rainbow25. Megneto -optics and electro optics26. Non linear optics27. Fiber optics -ii28. Holography -ii29. Interference -iii30. Diffraction of light (iv)31. Polarisation of light (iii)32. Twyman and green interferometer33. Crystal optics34. Chauchy's dispersion formulae35. Optical activity36. Geometrical optics -ii37. Interference of light-iv38. The echelon grating39. Laser in industry40. Photonics41. Fibre optic sensors42. Fibre characteristics43. Optical fibre44. Fibre losses45. Dispersion in optical fibres46. Optical fibre communication system