Unit 5: Refraction of Light questions and answers

Refraction of Light: sample questions with answers

What unit 5 covers

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

1. Lesson 1: Refraction of light in media

   • Introduction to refraction
   • Refraction of light through a glass slab
   • Terms about refraction
   • Laws of refraction (Snell's law)
   • Refractive index and speed of light
   • Lateral displacement
   • Optical density
   • Simple effects of refraction
   • Critical angle and total internal reflection
   • Applications of total internal reflection
   • Lesson exercise
   • Chapter exercise

2. Lesson 2: Refraction by spherical lenses

   • Introduction to lenses
   • Concave lenses
   • Convex lenses
   • Simple terms used in lenses
   • Rules for drawing images in a concave lens
   • Images formed by a concave lens
   • Rules for drawing images in a convex lens
   • Images formed by a convex lens
   • Sign convention for lenses
   • Lens formula and magnification
   • Numerical problems on lenses
   • Power of lenses
   • Unit of power of lens
   • The power of two or more lenses
   • Lesson exercise
   • Chapter exercise

3. Lesson 3: Optical instruments

   • Simple microscope (magnifying glass)
   • Parts of a microscope
   • Photographic camera
   • Human eye
   • Accommodation of the eye
   • Defects of vision and their correction
   • Short-sightedness or myopia
   • Correction of short-sighted eye
   • Long-sightedness or hypermetropia
   • Correction of long-sightedness
   • Presbyopia
   • Advantages of having two eyes in humans
   • Lesson exercise
   • Chapter exercise