Chapter Name: Light, Shadows and images
Activity Name: Observe the Reflection in Light, Shadows and images
The experiment aims to observe the reflection of light using a mirror and a torch. By adjusting the angle of the mirror and the position of the light source, students will observe the patch of light falling on another person standing in front of the mirror.
Additionally, they will explore the concept of reflected light by covering the mirror with a book and observing the absence of the patch of light.
- Black paper
Step by Step Procedure:
- Close the doors and windows of the classroom to make it dark.
- Ask a friend to hold a mirror in their hand.
- Take the torch and cover its glass with a black paper, leaving only a slit in the middle.
- Switch on the torch and adjust it so that the light passes through the slit and falls on the mirror in your friend’s hand.
- Instruct your friend to adjust the mirror so that the patch of light falls on another friend standing in front of them at some distance.
- When the light falls on the mirror, it rebounds back, which is known as reflection.
- By adjusting the mirror and the torch, a patch of light can be directed towards another person in front of the mirror.
- Ensure that the classroom is dark by closing doors and windows to effectively observe the reflection.
- Handle the torch and mirror carefully to avoid any accidents or damage.
Lesson Learnt from Experiment:
The experiment demonstrates the concept of reflection. When light falls on an object, it is reflected back. However, we can only see reflected light from objects like mirrors, which act as sources of reflection.
By covering the mirror with a book, students can understand that if light does not directly fall on an object, it does not get reflected, and therefore, we cannot see it.