Activity 16.2: Seeing objects in a dark room

To understand Activity 16.2 from Class 8 Science Chapter 16 on light, let's break it down into various sections:

Objective:
The objective of this activity is to demonstrate how objects can be seen in a dark room using the principle of reflection of light.

Materials Required:
- A small mirror
- A torch or flashlight
- A dark room
- Objects like books, pencils, or toys

Procedure:
1. Find a dark room where you can conduct the activity.
2. Turn off all the lights in the room.
3. Hold the mirror and shine the torch or flashlight on it.
4. Observe the reflection of light on the wall or any other surface in the room.
5. Place different objects like books, pencils, or toys in front of the mirror.
6. Observe the reflected light and see if you can identify the objects.

Explanation:
When you shine the torch on the mirror, it reflects the light. In a dark room, the reflected light becomes the only source of illumination. The light rays from the mirror travel in straight lines and hit the objects placed in front of it. Some of these light rays get reflected back and reach our eyes. This allows us to see the objects in the dark room.

Key Points:
- The mirror reflects light and acts as a source of illumination in a dark room.
- The reflected light helps us see the objects placed in front of the mirror.
- The light rays travel in straight lines and get reflected by the objects.
- The reflected light rays reach our eyes, allowing us to see the objects.

Conclusion:
Activity 16.2 demonstrates how objects can be seen in a dark room by using the principle of reflection of light. The mirror reflects the light, and the reflected light rays help us see the objects placed in front of it. This activity highlights the importance of light in enabling us to see objects around us, even in the absence of natural or artificial light sources.

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