CBSE · Class 10 · Science · Chapter 9

Light – Reflection and Refraction

Understand reflection and refraction of light using ray diagrams, mirrors, lenses and numerical relationships.

15 lessons 60 min
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Lessons in this chapter

  1. 1Reflection of LightLight follows rules so faithfully it could teach the class punctuality.
  2. 2Spherical MirrorsMirrors get curvy, and suddenly your face has opinions.
  3. 3Image Formation by Spherical MirrorsMove the candle a little and the image starts changing seats.
  4. 4Representation of Images Formed by Spherical Mirrors Using Ray DiagramsTwo rays do all the detective work while the others enjoy the day off.
  5. 5Image Formation by Concave MirrorThis mirror can shrink a tree, enlarge a tooth, and still look innocent.
  6. 6Image Formation by a Convex MirrorEverything looks smaller, but at least the mirror sees more traffic.
  7. 7Sign Convention for Reflection by Spherical MirrorsOne tiny sign mistake can send the image to the wrong side of the universe.
  8. 8Refraction of LightThe pencil is perfectly straight; light is the one causing the drama.
  9. 9Refraction through a Rectangular Glass SlabThe ray leaves parallel to where it started, just slightly off course.
  10. 10The Refractive IndexLight slows down in materials, proving even photons face traffic.
  11. 11Refraction by Spherical LensesConvex lenses gather rays while concave lenses politely send them apart.
  12. 12Image Formation by LensesMove the object and the image begins a full relocation programme.
  13. 13Image Formation in Lenses Using Ray DiagramsThree clever rays reveal where every lens image is hiding.
  14. 14Power of a LensA short focal length means a powerful lens with very little patience.
  15. 15Chapter Summary and PracticeEvery ray, mirror and lens returns for one final group photo.
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