1. This would not require modification of any physical constants or cosmological principles. 2. Planck units are designed to normalize the physical constants , and to 1. 3. The following table catalogues the notable changes in determination of fundamental physical constants . 4. What is an authoritative source for measured values of physical constants ? 5. These fundamental physical constants reflect special relativity and quantum mechanics, respectively. 6. However, the quantity is interrelated with other physical constants and formulas. 7. This well-known physical constant is commonly referred to as the speed of light. 8. Dimensionless quantity # Dimensionless physical constants gives a couple more examples. 9. It's more interesting to consider what would happen if various physical constants were changed. 10. The speed of light, like any dimensionful constant, isn't really a true physical constant .