A plano-convex lens rests with its curved side on a flat glass surface and is illuminated from above by light of wavelength 500 nm. (See Fig. 24.8.) A dark spot is observed at the center, surrounded by 19 concentric dark rings (with bright rings in between). How much thicker is the air wedge at the position of the 19th dark ring than at the center?
Free Compression Lab Continuation: We have seen that with four molecules in our gas box, a 50/50 split (2 on each side) has the most microstates but we do observe other configurations (all on one side for example) Just like with our coins, this would be true with real gas molecules too Why do we not see other options in our everyday world: we never see significant numbers of gas molecules on one side of a room! Something must happen when we increase the number of molecules from four to the 1028 in this room. To understand why, we will be looking at the fraction of the time that the split is within 10% of 50/50, i.e. “What fraction of the time is the number of molecules on the left between 40% and 60% of all of the mo