Source: wikibot/physical-constant
= Physical constant
{wiki=Physical_constant}
A physical constant is a quantity with a fixed value that does not change in time or space. These constants are fundamental in the laws of physics and are used to describe the properties of the universe. Examples of physical constants include: 1. **Speed of Light (c)** - Approximately \\(299,792,458\\) meters per second in a vacuum. 2. **Gravitational Constant (G)** - Approximately \\(6.