noun (plural quanta /-tə/)
- 1 Physics A discrete quantity of energy proportional in magnitude to the frequency of the radiation it represents.More example sentences
- This excess energy is emitted in quanta of electromagnetic radiation (photons of light) that have exactly same energy as the difference in energy between the orbits jumped by the electron.
- Bohr realized that the idea of a quantum of energy could explain how the electrons in the atom are arranged.
- To drop from a higher to a lower, it emitted a quantum of energy.
- 1.1An analogous discrete amount of any other physical quantity, such as momentum or electric charge.More example sentences
- Light bullets are the quanta of the electromagnetic field and are known as photons.
- A second problem also led to a quantum theory of light, and this time to a belief in the physical reality of the quanta.
- These symmetries tie together particles usually considered constituents of matter (like quarks and electrons) with the quanta of forces (like photons and gluons).
- 1.2 Physiology The unit quantity of acetylcholine released at a neuromuscular junction by a single synaptic vesicle, contributing a discrete small voltage to the measured end-plate potential.More example sentences
- Responses ensuing from the spontaneous release of single quanta are termed miniature excitatory junctional currents (mEJCs).
- In the crayfish leg extensor preparation, the number of quanta released per action potential (quantal content) was approximately 15, at low frequencies of stimulation.
- What fraction of receptors are saturated following the release of a single quantum, and is a larger synapse, with more receptors less saturated than a smaller one?
- 2A required or allowed amount, especially an amount of money legally payable in damages.More example sentences
- Assessing his prospects of success in those claims and the quantum of any damages requires many of the underlying issues to be tested or tried.
- Counsel for the plaintiffs submits that the quantum of damages should be assessed in the amount of $20,000.00 for each of the plaintiffs.
- It points out at line 15 that the first matter to be determined on an application under the section is: the quantum of common law damages which would have been recoverable had they been sued for.
- 2.1A share or portion: each man has only a quantum of compassionMore example sentences
- You would need to go the second step and, in addition, you would need to know the quantum of the shares.
- Haryana has a sense of grievance at the non-completion of the SYL canal and the consequent non-availability of the quantum of waters allocated to it.
- The quantum and the interest rate are not known, according to sources in the banking industry.
mid 16th century (in the general sense 'quantity'): from Latin, neuter of quantus (see quantity). Sense 1 dates from the early 20th century.
More definitions of quantumDefinition of quantum in:
- The British & World English dictionary