Physics - Senior Secondary 2 - Application of light waves

TERM: 1^ST TERM

WEEK: 12

Class: Senior Secondary School 2
Age: 16 years
Duration: 40 minutes for each of 5 periods
Date:
Subject: Physics
Topic: Application of Light Waves
Subtopics:
• Simple camera and film projector
• The human eye
• Simple microscope and compound microscope
• Telescope
• Prism binoculars

SPECIFIC OBJECTIVES:
By the end of the lesson, students should be able to:

1. Explain how light waves are used in simple optical devices like cameras and film projectors.
2. Understand the structure and function of the human eye.
3. Describe the operation of a simple and compound microscope.
4. Understand how telescopes and prism binoculars work.
5. Construct a simple box camera.

INSTRUCTIONAL TECHNIQUES:
• Explanation
• Demonstration
• Questions and answers
• Hands-on activity: Constructing a simple box camera
• Project work: Students to build a simple optical device

INSTRUCTIONAL MATERIALS:
• Cardboard boxes
• Lenses
• Light sources
• Mirrors
• Whiteboard markers
• Physics textbook

INSTRUCTIONAL PROCEDURES
PERIOD 1-5

PRESENTATION

STEP 1: INTRODUCTION
• The teacher introduces the practical applications of light waves in everyday optical devices such as cameras, microscopes, and telescopes.

STEP 2: EXPLANATION
• The teacher explains the principle of operation for each device.

• Simple Camera and Film Projector: These devices work based on the principle of image formation by lenses and projectors.
• The Human Eye: The eye acts like a camera, with the lens focusing light on the retina.
• Microscope and Telescope: These use lenses to magnify distant or small objects.
• Prism Binoculars: Utilize prisms for image correction and magnification.

STEP 3: DEMONSTRATION
• The teacher demonstrates how a simple camera works, focusing on image formation.

STEP 4: ACTIVITY
• Students will work in groups to construct a simple box camera.
• Each group will use cardboard, lenses, and mirrors to create a camera that can capture images.

STEP 5: NOTE TAKING
• The teacher writes a summary of the devices and their applications.

• A camera uses a lens to focus light and create an image on film.
• A projector works similarly but projects the image onto a screen.

EVALUATION

1. Describe how a camera works and its components.
2. Explain the function of the human eye and how it is similar to a camera.
3. What are the uses of microscopes and telescopes?

CLASSWORK:
• Write a step-by-step guide on how to construct a simple camera.
• Explain the differences between a microscope and a telescope.

CONCLUSION:
• Review the students’ projects and provide feedback on their box camera construction.
• Encourage students to explore the application of light in optical instruments.