Unit 4: Reflection of light questions and answers

Reflection of light: sample questions with answers

What unit 4 covers

Questions follow the book: Physics, Secondary, Form Four, Student Book.

1. Lesson 1: Reflection of light on plane surface

   • Introduction
   • Common characteristics of light
   • Reflection of light
   • Types of reflection of light
   • General definitions about reflection
   • Laws of reflection
   • Normal incidence
   • Image formed by plane mirrors
   • Inversion and lateral inversion
   • Differences between virtual and real image
   • Characteristics of an image formed in a plane mirror
   • Image formed by two plane mirrors
   • Uses of plane mirror
   • Reflecting periscope
   • Uses of reflecting periscope
   • Disadvantages of reflecting periscope
   • Lesson exercise

2. Lesson 2: Reflection of light at curved surface

   • Reflection of light at curved surface
   • Concave mirrors and convex mirrors
   • General definitions for spherical mirrors
   • Concave mirror as converging mirror
   • Convex mirror as diverging mirror
   • Principal focus
   • Focal length and radius of curvature
   • Focal plane
   • Graphical construction of images
   • Rules for drawing images in a concave mirror
   • Object at infinity, rays parallel to the principal axis
   • Object at infinity, rays not parallel to the principal axis
   • Object beyond the centre of curvature
   • Object at the centre of curvature
   • Object between the centre of curvature and the principal focus
   • Object at the principal focus
   • Object between the principal focus and the pole
   • Summary of images formed by a concave mirror
   • Rules for drawing images in a convex mirror
   • Formation of images in a convex mirror
   • Uses of concave mirrors
   • Uses of convex mirrors
   • Numerical problems on spherical mirrors
   • Lesson exercise
   • Chapter exercise