CONTENTS:- 1. BASIC CONCEPTS & FIRST LAW OF THERMODYNAMICS, 2. SECOND LAW OF THERMODYNAMICS, 3. ENTROPY, 4. APPLICATIONS OF THERMODYNAMICS, PAPER-II ( GEOMETRICAL OPTICS ) 1. FERMATS PRINCIPAL AND REFRACTION ( SPHERICAL SURFACES ), 2. IMAGE THEORY FOR LENS SYSTEMS, 3. OPTICAL ABERRATIONS AND DISPERSION, 4. ASSOCIATED OPTICAL INSTRUMENTS, PAPER-III ( ALEMENTARY SOLID STATE PHYSICS ) 1. ELEMENTS OF CRYSTAL STRUCTURE, 2. CRYSTALS DIFFRACTION AND RECIPROCAL LATTICE, 3. LATTICE VIBRATIONS AND THERMAL PROPERTIES OF SOLIDS, 4. FREE ELECTRON THEORY, 5. BANDS THEORY OF SOLIDS