(quantum mechanics) The field concerned with the interaction of radiation and matter, and on the effects of quantum mechanics on the behaviour of electrons.

Any of several forms of microscope that use a beam of electrons, rather than one of light, and thus has a much greater resolving power.

An electric circuit having at least one component that manipulates the voltage or current in the circuit

Any source of information available through electronic means, now usually via the Internet.

(physics) Any of several electronic devices that control electron current through vacuum, gas or vapor between electrodes within a sealed container, usually of glass or metal and often designed to be easily installed in and removed from the equipment in which it is used.

plural of electronic resource

(chemistry, physics) An electron, in an atomic orbital, for which there is no other electron in the same orbital but with opposite spin; a characteristic of free radicals and other reactive species

(physics) A measure of the probability of finding an electron at a specific location within an orbital / (physics) A measure of the number of electrons per unit volume of space.

(physics) The collective states of all electrons in an atom having the same principal quantum number (visualized as an orbit in which the electrons move).

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