The Simple Device That Prove The Law of Reflection.
(Science Project for Kids)
Present era is the era of science and computer. Analytical power, research and need of entertainment is also growing in men. Value of time has increased a lot. It is very important for the studenta to accelerate in their learning skills and make them relative to time. Keeping in view this need of students, I started to publish curiosity series.
I have published curiosity series related to manufacture and use of science equipment for lower secondary and secondary level home experiments. Some of our topic related to these are - Elementary Science Project, Science Project for Kids, Stem Fair ideas, Fun Science etc.
Now lets come to the project that I am going to show you step by step.
NECESSARY MATERIALS :
- A piece of plywood with the length of 20-25 cm & the breadth of 10-12 cm and block of common wood with the length and breadth of 20-25 cm and 8-10 cm respectively.
- Two blocks of common wood with the length and breadth 5cm and 2cm each respectively.
- 10-12cm small bamboo-pipes or caps of ball pens.
- A small and slight long plane mirror.
- Al foil or the shining paper that is used in the packet of cigarettes.
- Pen, Torch.
METHOD:
Make a small stool of the blocks of wood as shown in the picture.
Cut out a semicircular piece of plywood. Set the semicircular piece at the back of the stool. Mark the piece by measuring, angles of 0°, 10°, 45°, 60°, 90°, 120°, 150°, 180° on it with a protactor. Set the mirror on the stool and stick tje bamboo pipes (or the pen-caps with both ends open) on the piece of plywood in the marks of 30° to 150°. Stick or tie the pieces of shining paper on the tops of the pipes at 30°, 45° and 60°. The shining part of the paper ahould be turned to the pieces. When the torch is switched on and focused on the opening of the piece at 150°, the light is seen on the piece of shining paper at 30°. Similarly, when the torch is focused on thw tops of the pipes at 135° and 120°, the light is seen on the paper at 45° and 60° respectively. When it is focused at 0°, the light passes over 180° and when placed at 90°, the light is seen in no pipe, i.e., the light gets reflected vertically through the same pipe.
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| Model : Device to Prove The LAW OF REFLECTION OF LIGHT |
Cut out a semicircular piece of plywood. Set the semicircular piece at the back of the stool. Mark the piece by measuring, angles of 0°, 10°, 45°, 60°, 90°, 120°, 150°, 180° on it with a protactor. Set the mirror on the stool and stick tje bamboo pipes (or the pen-caps with both ends open) on the piece of plywood in the marks of 30° to 150°. Stick or tie the pieces of shining paper on the tops of the pipes at 30°, 45° and 60°. The shining part of the paper ahould be turned to the pieces. When the torch is switched on and focused on the opening of the piece at 150°, the light is seen on the piece of shining paper at 30°. Similarly, when the torch is focused on thw tops of the pipes at 135° and 120°, the light is seen on the paper at 45° and 60° respectively. When it is focused at 0°, the light passes over 180° and when placed at 90°, the light is seen in no pipe, i.e., the light gets reflected vertically through the same pipe.
REASON:
According to the law of Reflection of light, since the angle of incidence∠i = angle of Reflection ∠r, the light gets reflected formimg an angle equal to whatever it is focused on.
Good luck for you Project. Please comment you feedback regarding to this project and tell us your suggested topics.
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ScienceProject