Introduction
Reflection of Light is one of the fundamental topics of Optics and forms the base for understanding mirrors, image formation, and optical instruments. When light rays strike a smooth surface such as a mirror, they bounce back into the same medium; this phenomenon is known as reflection of light. The laws of reflection explain how light behaves on striking reflecting surfaces and are essential for solving numerical and conceptual questions in competitive exams like NDA and CDS.
Brief Overview
In this chapter, we study:
- The concept of incident ray, reflected ray, and normal
- The two laws of reflection of light
- Types of reflection: regular (specular) and irregular (diffused) reflection
- Reflection from plane mirrors and basic image characteristics
These concepts help in understanding how images are formed and how light travels after reflection.
Relevance for NDA & CDS 1 – 2026 Exam
Reflection of Light is a high-scoring and frequently asked topic in NDA and CDS Physics. Questions are generally:
- Concept-based on laws of reflection
- Assertion-reason or MCQs
- Simple numericals involving angles of incidence and reflection
A strong grasp of definitions, laws, and diagrams can help aspirants score easy marks with minimal calculation.
Conclusion
Reflection of Light lays the foundation for advanced optics topics such as spherical mirrors and ray diagrams. Understanding this chapter thoroughly enhances both conceptual clarity and exam confidence. For NDA & CDS 1 – 2026 aspirants, mastering reflection of light ensures accuracy, speed, and better performance in the Physics section.
