Class: Senior Secondary School 1 (SS1 / SSS 1)
Term: 1st Term
Week: 6
Age: 15 years
Duration: 45 minutes
Subject: Photography
Curriculum Theme: Trade
Previous Lesson: Photography Terminology: Zoom, Focus And Exposure.
Topic: THE THEORY OF LIGHT
Subject Matter: Meaning of light, Natural light sources, Artificial light sources, Importance of light to photography

Specific Objectives

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

Cognitive Domain:

Define light.
Identify and list natural sources of light.
Identify and list artificial sources of light.
State the importance of light in photography.

Affective Domain:

Appreciate the role of light in everyday life and photography.
Show interest in experimenting with different light sources.

Psychomotor Domain:

Point out various natural and artificial light sources in their environment.
Demonstrate the use of simple artificial light sources.

Share observations about light sources with classmates.
Collaborate with peers during light experimentation activities.

Reference Materials

The following resources were used in planning this lesson:

9 Years Basic Education Curriculum for Senior Secondary Schools.
State Unified Scheme of Work for Photography (Senior Secondary).
Anyanwu, C. N. (2018). Photography: Principles and Practice for Senior Secondary Schools. Abuja: Excellent Publishers.

Instructional Materials

The teacher will teach this lesson with the aid of:

A table lamp
A window to observe sunlight
A torchlight
A reflector (e.g., a piece of white cardboard or foil)
Pictures or charts showing various light sources

Rationale for the Lesson

Understanding light is fundamental for pupils to grasp how photography works. This lesson helps pupils recognize different light sources and their impact, which is essential for creating good photographs and appreciating the visual world around them.

Prerequisite/Previous Knowledge

Pupils have a basic understanding of light from their everyday experiences and previous science lessons.

Lesson Content/Board Summary

THE THEORY OF LIGHT

Meaning of Light

Light is a form of energy that enables us to see. It travels in straight lines and is essential for vision and for creating images in photography.

Natural Light Sources

These are sources of light that occur naturally in the environment without human intervention.

The following are natural light sources:

The Sun
The Moon (reflects sunlight)
Stars
Lightning
Fire (e.g., from a bushfire)
Bioluminescence (light from living organisms like fireflies)

Artificial Light Sources

These are sources of light created by humans, usually through technology or chemical processes.

The following are artificial light sources:

Electric bulbs (incandescent, fluorescent, LED)
Torchlight
Candles
Lamps (kerosene lamp, table lamp)
Flashlights
Studio strobes/flashes

Importance of Light to Photography

Light is the most important element in photography because without it, no image can be captured. It determines the exposure, mood, and quality of a photograph.

The following are reasons why light is important in photography:

It illuminates the subject, making it visible to the camera.
It influences the exposure (brightness) of the photograph.
It creates shadows and highlights, giving depth and dimension to an image.
It affects the colour and mood of the photograph.
Different types and directions of light can change the entire look of a picture.

Teaching Methods/Instructional Techniques

Discussion, Lecture, Demonstration, Question and Answer, Visual Aids

Instructional Procedures

Step 1: Introduction

Time: 5 minutes
Teaching Skill: Set Induction
Teacher’s Activity: The teacher greets the pupils and asks them to look around the classroom and identify what enables them to see objects. The teacher then introduces the topic, “The Theory of Light,” and explains that understanding light is fundamental to photography.
Pupils’ Activity: Pupils respond by mentioning light, windows, bulbs, etc. They listen attentively to the teacher’s introduction.
Learning Point: Pupils are prepared for the lesson and connect light to their ability to see.

Step 2: Meaning of Light

Time: 7 minutes
Teaching Skill: Explanation/Definition
Teacher’s Activity: The teacher defines light as a form of energy that makes vision possible. The teacher explains that light travels in straight lines and is crucial for photography.
Pupils’ Activity: Pupils listen, take notes, and ask questions for clarification.
Learning Point: Pupils understand the basic definition of light.

Step 3: Natural Light Sources

Time: 7 minutes
Teaching Skill: Listing/Identification
Teacher’s Activity: The teacher explains what natural light sources are and asks pupils to mention examples. The teacher then lists common natural light sources like the sun, moon, and stars, using the window to point out sunlight.
Pupils’ Activity: Pupils mention examples, observe the sunlight through the window, and take notes.
Learning Point: Pupils can identify and list natural sources of light.

Step 4: Artificial Light Sources

Time: 7 minutes
Teaching Skill: Demonstration/Identification
Teacher’s Activity: The teacher explains artificial light sources. The teacher demonstrates with a table lamp and torchlight, asking pupils to identify them as artificial. The teacher then lists other examples such as candles and electric bulbs.
Pupils’ Activity: Pupils identify the demonstrated items as artificial light sources and list other examples. They take notes.
Learning Point: Pupils can identify and list artificial sources of light.

Step 5: Importance of Light to Photography

Time: 7 minutes
Teaching Skill: Explanation/Elaboration
Teacher’s Activity: The teacher explains why light is so important in photography, stating that without light, no image can be formed. The teacher discusses how light affects exposure, mood, and dimension in a photograph.
Pupils’ Activity: Pupils listen, contribute ideas, and note the key points on the importance of light.
Learning Point: Pupils understand why light is fundamental to photography.

Step 6: Practical Demonstration and Experimentation

Time: 5 minutes
Teaching Skill: Demonstration/Practical Application
Teacher’s Activity: The teacher uses a torchlight and a reflector to show how light can be directed or softened on an object. The teacher encourages pupils to briefly experiment with the torchlight and observe its effects.
Pupils’ Activity: Pupils observe the demonstration and, if possible, briefly experiment with the available light sources to see how light behaves.
Learning Point: Pupils gain a practical understanding of how light can be manipulated.

Step 7: Evaluation/Review

Time: 5 minutes

Teaching Skill: Questioning/Assessment

Teacher’s Activity: The teacher evaluates the learning by asking the following questions:

What is light?
Mention three natural sources of light.
List three artificial sources of light.
State two reasons why light is important in photography.

Pupils’ Activity: Pupils answer orally and in writing.

Learning Point: Pupils demonstrate understanding of the lesson.

Step 8: Conclusion

Time: 2 minutes
Teaching Skill: Summarization/Consolidation
Teacher’s Activity: The teacher summarizes the key points of the lesson, emphasizing that light is essential for vision and photography. The teacher encourages pupils to observe light sources around them daily. The teacher assigns homework: “Draw and label two natural and two artificial light sources.”
Pupils’ Activity: Pupils listen to the summary and copy down the homework.
Learning Point: The lesson is reinforced, and pupils are given a task to consolidate their learning.

Lesson Keywords

Light – The natural agent that stimulates sight and makes things visible.
Natural Light – Light that comes from sources existing in nature, such as the sun.
Artificial Light – Light produced by human-made sources, such as electric bulbs or candles.
Photography – The art, application, and practice of creating durable images by recording light.
Reflector – A surface or object that reflects light.

Differentiation

For pupils who grasp concepts quickly, the teacher can challenge them to think about how the direction of light (e.g., front, side, back) affects a photograph. For pupils who need more support, the teacher can provide simplified diagrams of light sources and offer more direct guidance during the identification and listing activities.

Note for teachers using this lesson plan

Ensure that all instructional materials, especially electrical items like the table lamp, are in good working condition and used safely. Emphasize practical observation and encourage pupils to share their experiences with light. Encourage pupils to take simple photographs with their phones, paying attention to light, if appropriate and feasible.