Category: Values of Physics Constants

What is a Light Year? A light-year is a unit of distance. It is the distance a light photon travels in the vacuum in one Julian year. Denoted by ly, the value of one light-year is constant. The term light-year is often used in astrophysics to measure the distance between two astronomical objects. Light travels at a velocity…

The speed of light is defined as the speed with which a light photon travels in the vacuum. It is denoted by alphabet c and measure using SI unit m/s. The value of velocity of light or value of c is a constant at any part of the universe. This physical constant has multiple applications at various disciplines…

In thermodynamics, Boltzmann constant is the physical constant relating average kinetic energy of the gas particles and temperature of the gas represented by k or kB. The value of Boltzmann constant is measured using J/K or m2Kgs-2K-1. Boltzmann constant is one of the seven defining constants that have been given exact definitions. It is mostly…

Epsilon Naught is synonymous to the permittivity of free space or absolute permittivity or electric constant, represented by the Greek alphabet ε0. The Epsilon Naught value is constant at any part of the universe. It is often miss-used as the value of Epsilon not. Permittivity is the measure of the opposition offered against the formation of an…

In physics, the gas constant is defined as the product of pressure and volume. Denoted by R and expressed as energy per temperature increase per mole. The value of R in atm is constant. But the value of gas constant can be expressed using various units. The R is also known as ideal gas constant or universal gas constant or molar constant. Value…

What is the Value Of Electron? An electron is a subatomic particle commonly represented as e– or e. It posses negative polarity. An electron inherits the properties like – Charge, Mass, Spin, etc. The values of electron imply the value of the charge of an electron, the mass of the electron, and a quantum mechanical property-…

In physics, hc is a physical constant. Where h is Planck constant. It is the physical constant that relates the energy carried by a single photon to its corresponding frequency. The velocity of light in the vacuum is represented by c. Here h and c are constant, hence they are combined to give the value…

What is the Gravitational Constant? The gravitational constant is the proportionality constant that is used in the Newton’s Law of Gravitation. The force of attraction between any two unit masses separated by a unit distance is called universal gravitational constant denoted by G measured in Nm2/kg2. It is an empirical physical constant used in gravitational physics. It is also…

The acceleration experienced by a freely falling object due to the gravitational force of the massive body is called acceleration due to gravity and is represented by g measured using SI unit m/s2. The value of g depends on the mass of the massive body and its radius and its value varies from one body…