quantum
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amount / quota
A specific, often fixed amount, dose, or number of something. The term is frequently used to describe a required or assigned portion.
Jeder Mitarbeiter muss sein tägliches Quantum an Aufgaben erledigen.
Every employee must complete their daily quota of tasks.
quantum
In physics, the smallest, indivisible unit of a physical quantity, especially energy. Quantum mechanics describes how matter and energy behave at this level.
Licht wird in Form von diskreten Energiepaketen, den sogenannten Lichtquanten oder Photonen, abgegeben.
Light is emitted in the form of discrete packets of energy, so-called light quanta or photons.
In its general meaning, 'Quantum' (amount/quota) is a rather formal and educated word for 'Menge' (amount) or 'Anteil' (share). In normal usage, other words like 'Menge' or 'Portion' are more common.
Für dieses Projekt ist ein gewisses Quantum an Geduld erforderlich.
A certain amount of patience is required for this project.
The meaning is usually clear from the context. In texts about physics, energy, or light, it refers to the smallest physical unit. In all other situations, it simply means 'a certain amount'.
Die Theorie beschreibt, wie Energie in kleinen Quanten freigesetzt wird.
The theory describes how energy is released in small quanta.
A very common combination is 'sein tägliches Quantum' (one's daily quota/amount). This refers to the amount of something that a person habitually does or consumes every day.
Nach dem Mittagessen braucht er sein Quantum an starkem Kaffee.
After lunch, he needs his quota of strong coffee.
In the physics context, the plural form 'Quanten' (quanta) is the basis for many important technical terms. These include 'Quantenmechanik' (quantum mechanics), 'Quantenphysik' (quantum physics), and 'Quantensprung' (quantum leap).
Die Quantenmechanik ist ein fundamentaler Teil der modernen Physik.
Quantum mechanics is a fundamental part of modern physics.
amount / crowd
Menge generally refers to how much of something is available or needed. Quantum also means an amount, but sounds elevated or technical and often refers to a fixed or allocated portion. In neutral everyday language, Menge is usually the better choice.
Für den Versuch wird jedem Team ein festes Quantum Wasser zugeteilt.
Each team is allocated a fixed amount of water for the experiment.
Für den Versuch benötigen wir eine bestimmte Menge Wasser.
We need a certain amount of water for the experiment.
