Light and Optics
42 CDS Physics past-year questions from 18 papers, 2016 to 2026, with answers and worked solutions.
About this chapter
- Difficulty: 20 easy · 20 moderate · 2 hard.
- Most-asked subtopics: Light Phenomena and Spectrum (13), Lenses and Lens Formula (10), Refraction, Speed of Light and TIR (7).
- Updated 20 September 2026.
#1Lenses and Lens Formula
#2Reflection and Mirrors
#3Reflection and Mirrors
#4Light Phenomena and Spectrum
#5Refraction, Speed of Light and TIR
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#6Light Phenomena and Spectrum
#7Light Phenomena and Spectrum
#8Lenses and Lens Formula
#9Light Phenomena and Spectrum
#10Light Phenomena and Spectrum
#11Refraction, Speed of Light and TIR
#12Lenses and Lens Formula
#13Lenses and Lens Formula
#14Refraction, Speed of Light and TIR
#15Light Phenomena and Spectrum
#16Reflection and Mirrors
#17Reflection and Mirrors
#18Refraction, Speed of Light and TIR
#19Light Phenomena and Spectrum
#20Light Phenomena and Spectrum
#21Lenses and Lens Formula
#22Refraction, Speed of Light and TIR
#23Refraction, Speed of Light and TIR
#24Reflection and Mirrors
#25Light Phenomena and Spectrum
#26Lenses and Lens Formula
#27Lenses and Lens Formula
#28Lenses and Lens Formula
#29Light Phenomena and Spectrum
#30Lenses and Lens Formula
#31Human Eye and Optical Instruments
#32Reflection and Mirrors
#33Refraction, Speed of Light and TIR
#34Lenses and Lens Formula
#35Light Phenomena and Spectrum
#36Human Eye and Optical Instruments
#37Human Eye and Optical Instruments
#38Light Phenomena and Spectrum
#39Reflection and Mirrors
#40Human Eye and Optical Instruments
#41Human Eye and Optical Instruments
#42Light Phenomena and Spectrum