CONTENTS:-
1. FERMATS PRINCIPLE, 2. CARDINAL POINTS OF A COAXIAL LENS SYSTEM, 3. OPTICAL INSTRUMENTS AND ABERRATIONS, 4. NATURE OF LIGHT: HUYGENS PRINCIPE, 5. INTERFERENCE OF LIGHT-1 ( DIVISION OF WAVEFRONT ), 6. INTERFERENCE OF LIGHT- II, 7. DIFFRACTION OF LIGHT ( FRESNEL CLASS), 8. DIFFRACTION OF LIGHT ( FRAUNHOFER CLASS) 9. POLARIZATION OF LIGHT AND DOUBLE REFRACTION, 10. PRODUCTION AND ANALYSIS OF POLARISED LIGHT