## aberration Quick reference

### A Dictionary of Physics (8 ed.)

## acceleration Quick reference

### A Dictionary of Physics (8 ed.)

Symbol *a*. The rate of increase of speed or velocity. It is measured in m s^{−2}. For a body moving linearly with constant acceleration ...

## activity Quick reference

### A Dictionary of Physics (8 ed.)

## arithmetic series Quick reference

### A Dictionary of Physics (8 ed.)

## band theory Quick reference

### A Dictionary of Physics (8 ed.)

The theory that, in crystals, electrons fall into allowed *energy bands, between which lie forbidden bands. Although *free-electron theory...

## barometer Quick reference

### A Dictionary of Physics (8 ed.)

## Bayes’ theorem Quick reference

### A Dictionary of Physics (8 ed.)

## Beckmann thermometer Quick reference

### A Dictionary of Physics (8 ed.)

## beta decay Quick reference

### A Dictionary of Physics (8 ed.)

A type of weak interaction (*see*

## BET isotherm Quick reference

### A Dictionary of Physics (8 ed.)

## big-bang theory Quick reference

### A Dictionary of Physics (8 ed.)

## binomial distribution Quick reference

### A Dictionary of Physics (8 ed.)

The distribution of the number of successes in an experiment in which there are two possible outcomes, success and failure. The probability of ...

## binomial theorem Quick reference

### A Dictionary of Physics (8 ed.)

A rule for the expansion of a binomial expression (expression consisting of the sum of two variables raised to a given power). The general binomial expression (...

## Bloch sphere Quick reference

### A Dictionary of Physics (8 ed.)

## Boltzmann constant Quick reference

### A Dictionary of Physics (8 ed.)

Symbol *k* or *k*
_{B}. The ratio of the universal gas constant (*R*) to the Avogadro constant (...

## Boltzmann equation Quick reference

### A Dictionary of Physics (8 ed.)

## Born–Haber cycle Quick reference

### A Dictionary of Physics (8 ed.)

A cycle of reactions used for calculating the lattice energies of ionic crystalline solids. For a compound MX, the lattice energy is the enthalpy of the reaction...

## Bragg’s law Quick reference

### A Dictionary of Physics (8 ed.)

When a beam of X-rays (wavelength λ) strikes a crystal surface in which the layers of atoms or ions are separated by a distance ...