31. The physical constant known as the Rydberg constant is named after him, as is the Rydberg unit. 32. In some candidate theories, the actual number of independent physical constants may be as small as one. 33. It is known that anthropic explanations of the values of some of the dimensionless fundamental physical constants . 34. Its optical and physical constants are however variable, owing to the different stabilizers used by different producers. 35. Fine-tuning refers to the physical constants being just right for life as we know it to evolve. 36. Freeman Dyson later wrote that Shlyakhter had " revolutionized the subject " of variation in physical constants . 37. These values depend on the solvent used and the type of TLC plate and are not physical constants . 38. Different bubbles may experience different spontaneous symmetry breaking, which results in different properties, such as different physical constants . 39. The parameter " ? " 0 is a measurement-system constant, not a physical constant that can be measured. 40. Hence most physicists would not deem it a dimensionless physical constant of the sort discussed in this entry.
