observables

Things we measure

Observable things are those that can be observed—seen, measured, or detected.

In physics, observables are quantities that can be measured: position, momentum, energy.

The term is central to quantum mechanics, where the act of measuring an observable affects the system being measured.

In programming, observables are data streams that emit values over time, allowing code to react to changes: The component subscribes to the observable and updates when new data arrives.

physics

measurement

Determining size or amount

spectrum · wavefunction · quantum · superposition · entanglement · collapse · uncertainty · particle · momentum · position

data

variables

Changeable elements in equations

records · values · readings · samples · parameters · statistics · analytics · patterns · trends · correlation

indicators

signs

Displays conveying information

cues · evidence · clues · traces · manifestations · patterns · trends · benchmarks · metrics · indices

Opposites
epistemic accessibility

observableshidden variables

Unobserved explanatory quantities

noumena · things-in-themselves · unknowables · invisibles

manifestation

observablesinvisibles

Things not visible

measurability in physics

observableshidden variables

Unobserved explanatory quantities

virtual particles · wave functions

Phrases
Family

observable, unobservable, observably

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