1. Mechanics
    2. 1. Physical quantities
    2. Vectors
    3. Kinematics
    4. Dynamics
    5. Work, Energy and Power
    6. Circular Motion
    7. Gravity and Gravitation
    8. Elasticity
  2. Heat and Thermodynamics
    3. 9. Heat and Temperature
    10. Thermal Expansion
    11. Quantity of Heat
    12. Rate of Heat Flow
    13. Ideal Gas
  3. Waves and Optics
    4. 14. Reflection at Curved Mirrors
    15. Reflections at Plane Surfaces
    16. Refractions through Prisms
    17. Lens
    18. Dispersion
  4. Electricity and Magnetism
    5. 19. Electric Charges
    20. Electric Field
    21. Electric Potential
    22. Capacitance and Dielectrics
    23. DC Circuits
  5. Modern Physics
    6. 24. Nuclear Physics
    25. Solids
    26. Recent Trends in Physics
Waves and Optics
17. Lens