Class 7 Physics Lesson Plan - Chapter 4: Light Energy
Class 7 Physics Lesson Plan
Chapter 4: Light Energy
Subtopics
- Reflection and Laws of Reflection
- Speed of Light [3 × 108 m/s]
- Plane Mirror
- Primary Colours (RGB - Red, Green, Blue)
- Formation of Secondary Colours by Colour Addition
- Appearance of Colour of an Object (Based on Absorption and Reflection)
Learning Objectives
- Understand the laws of reflection and how light behaves when it strikes a surface.
- Recognize the speed of light and its importance in physics.
- Learn about plane mirrors and their characteristics.
- Identify primary colours and how they mix to form secondary colours.
- Analyze how objects appear in different colours due to reflection and absorption of light.
Procedure
- Introduce the concept of reflection and demonstrate with a mirror.
- Explain the speed of light and its role in optical phenomena.
- Discuss plane mirrors and their properties using practical examples.
- Demonstrate the primary colours (RGB) using a light source.
- Show how secondary colours are formed through colour addition.
- Explain why objects appear in different colours based on light absorption and reflection.
Activities
- Experiment: Use a laser pointer and a mirror to demonstrate reflection.
- Group discussion on real-life applications of reflection (periscopes, rearview mirrors).
- Practical: Mixing coloured light using a projector or LED sources.
- Observation: Identifying colours of different objects under different lights.
Skill/Values
- Scientific observation and reasoning.
- Analytical thinking in optics.
- Application of physics in daily life.
- Creativity in understanding colours and light.
Assessment
- Class discussion and Q&A sessions.
- Worksheet on reflection, speed of light, and colour formation.
- Practical experiments on mirror reflection and colour mixing.
- Quiz on laws of reflection and primary colours.
