Chapter 24, Problem 7P

24.1 and 24.2 Young’s double-slit experiment and Index of refraction, light speed, and wave coherence

* An LED bulb emits light that looks red. After passing through a narrow single slit, the light strikes two very narrow slits separated by distance d and located a distance D from the single slit. After passing through the pair of slits, the light strikes a screen a distance L away (a) Make a sketch of the pattern that you would expect to see on the screen if light behaves like a wave. (b) Below the interference pattern, sketch the pattern that you would expect to see if light behaves like a stream of very light particles.