The law of reflection

Bending Light by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC-BY-4.0 (https://phet.colorado.edu)

The title of the Project: The law of reflection

Purpose of the work:

• Prove the law of reflection.

Practical part

Choose “Intro” to start the virtual experiment. 

This is a little instruction to the virtual experiment.

Virtual experiment.

Step 1. Turn on the laser. Take the protractor and place it along the normal line to the surface.

Step 2. Measure the angle between the incident ray and the normal line. This is the angle of incident ray.

Step 3. Measure the angle between the reflected ray and the normal line. This is the angle of reflection.

Step 4. Notice that these angles are the same.  

Step 5. Change the angle of incident ray. Does the reflected angle change? 

Step 6. Increase the index of refraction from the incident ray side. Does the reflected angle change? 

Step 7. Make a conclusion.  

Conclusion

The law of reflection states that the angle of incident ray is equal to the angle of the reflected ray.