2004 2003 2002 2001 2000
  (Sub-Topics) Screening (%) Mains(%)
  1. Reflection on plane mirrors 2.85 0
  2. Reflection on curved mirrors 0
  3. Refraction on plane surfaces 2.85 0
  4. Total internal reflection 2.85 0
  5. Lenses 5.71 6
  6. Prisms 0 0
  7. Interference 2.85 4
  Total 17.11 10