Optics: page 2

AP Physics 2: Optics 6: Refraction Problem 1: Semicircular Dish

• • Light traveling from air to glass (semi-circular block of glass): light refraction in a air glass surface, varying incidence angle https://www.youtube.com/watch?v=Jqoy9BIpiCk

  • The light source in the demonstration is on the left side. Because light is retraceable, had the light source been on the right side, the light beam would have followed exactly the same path from right to left. 

AP Physics 2: Optics 7: Refraction Problem 2: Rectangular Block

• AP Physics 2: Optics 8: Critical Angle and Total Internal Reflection

• • • Do you remember how I had to spray smoke particles into air for you to see light rays in air? (It’s in the Optics 2: Ray Model, Geometric Optics, and Specular and Diffuse Reflection: AP Physics Lessons with Ms. Twu.) In this demo video, in order for the observers to see light rays in water, we would add a bit of milk or coffee creamer in the water, so there are particles in water to produce diffuse reflection. Otherwise we would not be able to see the rays in water. In any case, for this demo video, you only need to watch from beginning to 1:28. The rest of the video is just a repeat:   

    • Reflection and refraction of colored light in water air surface 2, varying incidence angle https://www.youtube.com/watch?v=2kBOqfS0nmE

• • This next demo video is very similar to the last one, but it’s for glass-air interface. Again, you only need to watch from beginning to 1:28. The rest of the video is just a repeat:

  • light refraction in a glass air surface, varying incidence angle https://www.youtube.com/watch?v=8VZHym6HqVU

• AP Physics 2: Optics 9: Critical Angle Problem and View from Underwater

• AP Physics 2: Optics 10: Diamond and Optical Fiber