Reflection_and_Mirrors_Science10.ppt presentation

Reflection and Mirrors

1. Reflection and Mirrors Science 10 | Quarter 1 Prepared by Mr. Rolan Aribato, Science Department

2. Lesson Objectives 1. Explain the laws of reflection. 2. Differentiate between regular and diffuse reflection. 3. Identify types of mirrors and their characteristics. 4. Construct ray diagrams for concave and convex mirrors. 5. Describe real-life applications of mirrors.

3. What is Reflection? Reflection is the bouncing back of light when it hits a surface it cannot pass through. Types of Reflection: • Regular (Specular) – occurs on smooth surfaces. • Diffuse (Irregular) – occurs on rough surfaces.

4. Laws of Reflection 1. The angle of incidence equals the angle of reflection. 2. The incident ray, reflected ray, and normal all lie on the same plane.

5. Plane Mirrors • Image is virtual, upright, and same size as the object. • Produces lateral inversion. • Examples: Bathroom mirrors, periscopes.

6. Spherical Mirrors Two types of spherical mirrors: 1. Concave (Converging) – focuses light; used in flashlights, telescopes. 2. Convex (Diverging) – spreads light; used in vehicle side mirrors.

7. Concave Mirror Ray Diagrams • Object beyond C → Real, inverted, smaller. • Object at F → No image (rays parallel). • Object between F and mirror → Virtual, upright, enlarged.

8. Convex Mirror Ray Diagrams • Always forms a virtual, upright, and smaller image. • Used in security mirrors and car side mirrors.

9. Applications of Mirrors Plane Mirror – for daily use and optical instruments. Concave Mirror – for magnification (dentist, makeup mirror). Convex Mirror – for wide view (vehicle mirrors, stores).

10. Check Your Understanding 1. What are the two laws of reflection? 2. Differentiate between regular and diffuse reflection. 3. Why are vehicle mirrors convex? 4. What kind of image does a concave mirror form when the object is between F and C?

11. Summary • Reflection follows predictable laws. • Mirrors form images based on their curvature. • Reflection principles are applied in daily life and optical devices.

12. References • Department of Education (2023). Science 10 Learner’s Module. • Serway & Faughn, Principles of Physics. • OpenStax, Physics (2nd Ed.).