Q:

# What is vacuum permittivity?

A:

Vacuum permittivity is a physical constant that denotes the ideal value of the absolute dielectric permittivity of a classic vacuum. It is also known as permittivity of free space or electric constant and has a value of roughly 8.854E-12 farads per meter.

## Keep Learning

Vacuum permittivity connects the concepts of mechanical measurements to that of electric charges. The constant is used in Coulomb's Law to calculate the force experienced by two electric charges that have been separated from each other. As the distance between the two charges increases, the force acting between them decreases. Vacuum permittivity also appears as part of Maxwell's equations that relate magnetic and electric fields to their respective sources.

The value of vacuum permittivity may be calculated from the speed of light and another constant called the permeability of free space. Vacuum permittivity is calculated as the reciprocal of the product of the square of the speed of light and the permeability of free space. The formula for this relationship is e0 = 1 / (c^2 x u0), where "e0" is the vacuum permittivity, "c" is the speed of light and "u0" is the permeability of free space.

The origin of the concept of vacuum permittivity stemmed from experiments by French physicist Charles-Augustin de Coulomb, who developed a working definition of attractive and repulsive electrostatic forces.

Sources:

## Related Questions

• A: The speed of light in a vacuum is measured at 186,282 miles per second, which is 670,616,629 miles per hour. The speed of light is denoted mathematically b... Full Answer >
Filed Under:
• A: Self-propelled vacuum cleaners that receive high ratings from consumers include the Dyson DC65 Animal Upright Vacuum, the Shark Rocket HV301 Stick Vacuum a... Full Answer >
Filed Under:
• A: The top-rated central vacuum cleaner systems as of April 2015 are the Dust Care DC-2000C and the Hoover Platinum Central Vacuum system, as reported by vacu... Full Answer >
Filed Under:
• A: Some vacuum cleaners that work well on stairs are Eureka RapidClean Step Handheld Corded Vacuum, Shark Rocket Truepet, Shark Rocket Corded Hand Vac, Hoover... Full Answer >
Filed Under:
PEOPLE SEARCH FOR