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Laser Reflection Project

The project investigates the laws of reflection and refraction using a laser pointer and a mirror. It demonstrates that the angle of incidence equals the angle of reflection, confirming the laws of reflection. The experiment involves measuring angles and observing light behavior with a glass slab for refraction.

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muscularkaran24
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332 views2 pages

Laser Reflection Project

The project investigates the laws of reflection and refraction using a laser pointer and a mirror. It demonstrates that the angle of incidence equals the angle of reflection, confirming the laws of reflection. The experiment involves measuring angles and observing light behavior with a glass slab for refraction.

Uploaded by

muscularkaran24
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Investigatory Project: Study of

Reflection and Refraction Using Laser


and Mirror
1. Title
Study of Reflection and Refraction Using Laser and Mirror

2. Aim
To study the laws of reflection and refraction using a laser pointer, a mirror, and a
protractor.

3. Theory
Reflection is the bouncing back of light when it hits a reflective surface such as a mirror. The
law of reflection states:
- The angle of incidence is equal to the angle of reflection.
- The incident ray, the reflected ray, and the normal all lie in the same plane.

Refraction is the bending of light as it passes from one medium to another. Snell's law
governs refraction:
n1 * sin(i) = n2 * sin(r), where:
- n1 and n2 are the refractive indices of the two media
- i is the angle of incidence
- r is the angle of refraction

4. Apparatus Required
- Laser pointer
- Plane mirror
- Protractor
- White sheet of paper
- Pencil and scale
- Glass slab (for refraction) (optional)
- Pins (for marking)
- Ruler
5. Procedure
1. Fix a white sheet of paper on a drawing board.
2. Place the protractor at the center and draw the normal line (90°).
3. Place the plane mirror along the normal.
4. Shine the laser pointer at different angles (30°, 45°, 60°).
5. Mark the reflected ray path using pins.
6. Measure the angle of reflection with the protractor.
7. Record the angle of incidence and corresponding reflection.
8. For refraction, place a glass slab and observe bending of light.

6. Observations
Table: Angle of Incidence vs Angle of Reflection

Angle of Incidence (°) | Angle of Reflection (°)


------------------------|-------------------------
30 | 30
45 | 45
60 | 60

7. Result
The experiment verifies the laws of reflection. It was observed that the angle of incidence is
equal to the angle of reflection.

8. Precautions
- Handle the laser pointer carefully and never point it at the eyes.
- Use a clean mirror for clear reflection.
- Make accurate angle markings.
- Perform the experiment in a slightly dark room for visibility.

9. Conclusion
The laws of reflection were successfully verified using a laser pointer and a plane mirror.

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