Concave in Reflection of Light – Class 7 Science Experiment

Chapter Name: Reflection of Light

Activity Name: Concave in Reflection of Light

Activity Description:

Concave in Reflection of Light - Class 7 Science Experiment
Concave in Reflection of Light - Class 7 Science Experiment
Concave in Reflection of Light - Class 7 Science Experiment

In this experiment, students will work with a rubber ball, cutting a portion of it to create a concave surface and observe the corresponding convex surface. They will learn about concave and convex mirrors and understand the concept of spherical mirrors.

Required Items:

  1. Rubber ball
  2. Knife (teacher’s assistance required)

Step by Step Procedure:

  1. Obtain a rubber ball and seek your teacher’s help to cut a portion of it with a knife as shown in the figure.
  2. Observe and identify the inner cut surface of the ball as the concave surface and the outer surface as the convex surface.
  3. Explore the properties of concave and convex mirrors based on their reflecting surfaces using the figures provided.
  4. Understand that any convex or concave mirror is a part of a sphere, leading to their classification as spherical mirrors.

Experiment Observations:

  • Observe the cut surfaces of the rubber ball and identify the concave and convex surfaces.
  • Explore the figures of concave and convex mirrors to understand their reflective properties.

Precautions:

  1. Seek your teacher’s assistance while using the knife to cut the rubber ball to avoid accidents.
  2. Handle the rubber ball with care to prevent any injuries or damage.

Lesson Learnt from Experiment:

Through this experiment, students will learn about concave and convex surfaces and their relationship to concave and convex mirrors. They will understand that these mirrors are part of a sphere, making them spherical mirrors.

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