Photo-Electric
Photo-Electric
Photo-Electric
Photo-Electric
Radio Activity
Radio-Activity
Radio-Activity
Radio-Activity
Radioactivity
Electronics
Electronics
Electronics
Electronics

Factors effecting photoelectric emissions
Plank?s constant
The quantum theory of light
Application of photoelectric effect
Types of radiation
Detecting nuclear radiations
Radio-active decay
Hazards of radioactivity
Nuclear fission and fusion
Conductors and semi-conductors
Intrinsic and extrinsic semi-conductors
Characteristics of p-n junction
Applications of diodes

By the end of the lesson, the learner should be able to:
State the factors affecting photo-electric emission
Explain the factors affecting the photoelectric emissions
Define plank?s constant threshold frequency work function and photoelectric effect
Explain threshold frequency, work function and photoelectric effect
Determine the energy of p photos
Apply the equation E=hf to calculate the energy of photos
Explain photoelectric effect using Einstein?s equation=hf+1/2mv2
Explain the working of a
Photo emissive cell
Photo conductive cell
Photo voltaic cell
Describe the three types of radiations produced by radioactive elements
explain how a diffusion cloud chamber works
define radio-active decay and half life
Explain the dangers of radioactive emissions
Define nuclear fission and nuclear fusion
Write balanced nuclear equations
State the application of radioactivity
Differentiate between conductors and semi-conductors
Explain doping in semi-conductors
Explain the working of p-n junction diode
Distinguish between intrinsic and extrinsic semi-conductors
sketch the current voltage characteristics for a diode
explain the application of diodes in rectifications

Discussions
Demonstrations
Demonstration
Calculations
Discussions
discussion
Problem solving
Experiments
experiments
Questions and answers

charts
Chart on the use of Einstein?s equation
Charts on the photo cell and how it works
Solar panels
Watch cells
Radiation
detectors
Radiation detectors
Charts on radio-active decay
diffusion cloud chamber
Periodic table
Some semi-conductors
Some insulator
Samples of semi-conductors
Complete circuit
Transistors
Junction diode
Chart showing the application of diode

Comprehensive secondary physics students book 4 pages 88-90
teachers book 4 pages 38-40
Secondary physics KLB students book 4 page 156-158