No, voltage does not directly regulate electromagnetic velocity. Electromagnetic velocity, also known as the speed of light, is a fundamental constant in nature and is independent of voltage.
The speed of light in a vacuum is approximately 299,792,458 meters per second (or about 186,282 miles per second). This speed is determined by the properties of free space and the relationship between electric and magnetic fields.
Voltage, on the other hand, is a measure of the electric potential difference between two points in an electric circuit. It represents the energy per unit charge required to move charged particles between those points. Voltage affects the behavior of electric current and the flow of electrons in a circuit, but it does not directly impact the speed of light or electromagnetic waves.
It's worth noting that in certain materials, such as those with a refractive index greater than one, the speed of light can be reduced compared to its speed in a vacuum. This reduction is influenced by the electric and magnetic properties of the material, rather than voltage alone.