the Mirrors_and_Lenses for grade 10 science.pptx

ppt

1. Qualitative Description of Images Formed by Mirrors and Lenses Science Presentation By: Sir Paul

2. Learning Objectives • Predict orientation, size, type, and location of images • Describe image formation by plane and curved mirrors • Understand basic lens image formation

3. Basic Definitions • Light Ray: path of light • Incident Ray: incoming ray • Reflected Ray: bouncing ray • Normal Line: perpendicular to surface • Angles of Incidence & Reflection

4. Law of Reflection • Angle of incidence = Angle of reflection • Basis of mirror image formation • Works for all types of mirrors

5. Plane Mirrors • Image is virtual and erect • Same size as object • Located behind mirror • Object distance = Image distance

6. Types of Reflection • Specular (regular): smooth surface • Diffuse (irregular): rough surface

7. Curved Mirrors • Concave and convex mirrors • Important parts: Principal Axis, Focus (F), Center of Curvature (C), Vertex (V) • Ray diagram rules

8. Concave Mirror Images • Beyond C: Real, inverted, smaller • At C: Real, inverted, same size • Between C & F: Real, inverted, larger • At F: No image formed • Between F & V: Virtual, erect, magnified

9. Convex Mirror Images • Always virtual and erect • Smaller than object • Located behind mirror

10. Summary • Plane mirror: virtual, same size, erect • Concave mirror: image varies with object position • Convex mirror: always virtual, erect, smaller • Lens: similar principles with refraction