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Refraction of Light at Curved Surfaces — Syllabus

Telangana Board · Class 10 · Physical Sciences

Refraction of Light at Curved Surfaces topics: Curved Surfaces: Basic Terms, Image Formation at a Curved Surface, Lens Basics and Terminology, plus 1 more.

45 questions40 flashcards8 formulas & key relations5 concepts

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4 Topics · Telangana Board Class 10 Physical Sciences · 2026-27

Topics in Refraction of Light at Curved Surfaces

1

1. Curved Surfaces: Basic Terms and Refraction

  • The centre of the sphere, of which curved surface is a part, is called the centre of curvature and is denoted by C.
  • The centre of the curved surface is called the pole P.
  • The line joining the centre of curvature and the pole is called the principal axis.
2

2. Image Formation at a Curved Surface

  • Light from a point object on the principal axis can form an image by refraction at a curved surface.
  • One ray passes along the principal axis and remains undeviated.
  • Another ray strikes the curved surface and bends according to the refractive indices of the two media.
3

3. Lens Basics and Terminology

  • A lens is formed when a transparent material is bounded by two surfaces, of which one or both are spherical.
  • A lens is bounded by at least one curved surface.
  • A double convex lens is thick at the middle and thin at the edges.
4

4. Ray Rules for Lenses

  • Any ray passing along the principal axis is undeviated.
  • Any ray passing through the optic centre is also undeviated.
  • A ray passing through the focus emerges parallel to the principal axis after refraction.

Key Concepts

Central concept: Refraction of light at curved surfaces and thin lenses

Curved refracting surfaceRules of refractionParaxial rays and approximationCurved surface formulaImage formation by curved surfaceLensLens terminologyRay behaviour through lenses

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Frequently Asked Questions

What are the important topics in Refraction of Light at Curved Surfaces for Telangana Board Class 10 Physical Sciences?
Key topics in Refraction of Light at Curved Surfaces include Curved Surfaces: Basic Terms and Refraction, Image Formation at a Curved Surface, Lens Basics and Terminology, Ray Rules for Lenses. Study these first, then practise questions on each for the Telangana Board Class 10 board exam.
How should I revise Refraction of Light at Curved Surfaces for the Telangana Board Class 10 board exam?
Learn the core ideas first, then work through the 45 practice questions on Refraction of Light at Curved Surfaces. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All Telangana Board Class 10 Physical Sciences Syllabus

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