Unit 14 · Waves, Sound, and Physical Optics
Chapter 14.5
Thin-Film Interference
A soap bubble has no color of its own, yet it shimmers in every color, and the top of it turns black just before it pops. Two reflections, a hair's-width apart, are interfering.
in preparation · lesson 23 of 27
By the end
- 01Predict the phase change on reflection from a faster or a slower medium
- 02Combine the two reflections from a thin film to predict constructive or destructive interference
- 03Explain the colors of oil films and soap bubbles and the quarter-wave antireflection coating