Explanation :
A.A Michelson was the American scientist who proved the speed of light as a fundamental constant. According to him, the value of speed of light is
![3* 10^8\ m/s](https://img.qammunity.org/2020/formulas/physics/high-school/ks86dmym7sxdf8u3g31nulpxe5c16w96hm.png)
He received a noble price for this achievement. He constructed an interferometer. It is a device which is designed to split the beam of light in two parts.
The speed of light is denoted by c.