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Chapter Summary

Light: Mirrors and Lenses

CBSE · Class 8 · Science

Summary of Light: Mirrors and Lenses for CBSE Class 8 Science. Key concepts, important points, and chapter overview.

41 questions68 flashcards5 concepts

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Overview

Light changes direction when it reflects from mirrors and when it passes through lenses. Spherical mirrors and lenses form different kinds of images depending on their shape and the position of the object. Concave and convex mirrors have important uses in daily life, safety, and science. Lenses are

Key Concepts

Mirrors whose reflecting surfaces are spherical

Mirrors whose reflecting surfaces are spherical are called spherical mirrors. A concave mirror has its reflecting surface curved inward, while a conve

A concave mirror curves inward

A concave mirror curves inward and converges light. When the object is close, the image is erect and enlarged. As the object moves farther away, the i

A convex mirror curves outward

A convex mirror curves outward and diverges light. The image is always erect and diminished, and it becomes slightly smaller as the object moves farth

The incident ray

The incident ray, the normal, and the reflected ray lie in the same plane, and the angle of incidence equals the angle of reflection: angle of inciden

A ray falling on a mirror

A ray falling on a mirror is the incident ray, and the ray coming back is the reflected ray. The normal is drawn at 90° to the mirror at the point of

Learning Objectives

  • Understand what spherical mirrors are and how concave and convex mirrors differ.
  • Learn the laws of reflection and apply them to plane and spherical mirrors.
  • Recognise how images change in concave mirrors, convex mirrors, convex lenses, and concave lenses.
  • Identify how mirrors and lenses are used in everyday life and in scientific devices.
  • Understand how sunlight can be concentrated using mirrors and lenses.

Frequently Asked Questions

What are the important topics in Light: Mirrors and Lenses for CBSE Class 8 Science?
Light: Mirrors and Lenses covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Light: Mirrors and Lenses — CBSE Class 8 Science?
Understand the core concepts first, then work through the 41 practice questions available for this chapter. Revise formulas and 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.

More resources for Light: Mirrors and Lenses

All 13 chapters — CBSE Class 8 Science Chapter Summary

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