Refraction Of Light
Refraction Of Light

The meaning of refraction
Laws of refraction
Refractive index
Application of a total internal reflection in a prism periscope, optical fibre
Dispersion of white light and recombination of colors of the spectrum
Problems of refractive index and critical angle
Total material reflection and its effect Critical angle

By the end of the lesson, the learner should be able to:

Describe simple experiments to illustrate refraction of light
State the laws of refraction and define refractive index
Determine the refractive index of a given substance
Explain the working of a prisms and optical fibres among other applications
Describe an experiment to illustrate the dispersion of light
Solve problems involving the refractive index and critical angle
Describe an experiment to explain the total internal reflection and its effects
Define critical angle

Experiments demonstrating refraction of light
Discovering Snell?s law of refraction through experiments
Defining refractive index
Stating the laws of refraction
Experiments to determine the refractive index of rates and glass by real and apparent depth method
Making a periscope
Discussion on working of an optical fibre
Experiment on dispersion of light using glass prisms
Discussions and problem solving in critical angle using the formulae sin C=i/n and n=sin i/sin r
Experiments to explain the total internal reflection and its effects
Defining critical angle
Observations and discussions on critical angle
Total internal reflection

Beakers
Water
Stick or glass rod
Basins
Coins
Glass blocks
Pin
Pins
Soft board
Plain paper
Geometric set
Plain papers
Charts on total internal reflection and applications
Triangular glass prisms
Source of light
Screen
Review questions
Past exams
Examples in the topic
Soft boards
Pins
Geometrical set

Comprehensive secondary physics students book 3 pages 11-12
Comprehensive secondary physics teachers book 3 pages6-9
Secondary physics KLB students book 3 page 41-46