What is the speed of light in a vacuum commonly denoted as?

The speed of light in a vacuum is commonly denoted by the symbol "c". This notation is widely recognized in physics, particularly in the context of the theory of relativity, where "c" represents not only the speed of light but also serves as a fundamental constant of nature, approximately equal to 299,792,458 meters per second.

The other symbols mentioned have specific meanings in physics as well: "v" typically refers to velocity, "λ" (lambda) is used to denote wavelength, and "f" represents frequency. While these symbols are important in their respective contexts, they do not represent the speed of light in a vacuum. By using "c" specifically for the speed of light, scientists and researchers maintain clarity and consistency in their discussions related to light and electromagnetic radiation.