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spectrum

/ˈspektɹəm/ /ˈspɛkt(ʃ)ɹəm/

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noun

Éventail, spectre

A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.

Examples :

"The spectrum of emotions my sister displayed during the argument was wide, from anger to sadness to confusion. "

L'éventail d'émotions que ma sœur a affichées pendant la dispute était large, allant de la colère à la tristesse en passant par la confusion.

range type aspect system toefl

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noun

Spectre

Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.

Examples :

"The rainbow demonstrates the visible spectrum of light, showing all the colours from red to violet. "

L'arc-en-ciel démontre le spectre visible de la lumière, montrant toutes les couleurs du rouge au violet.

physics astronomy energy frequency color science toefl

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noun

Le spectre de l'autisme

The autism spectrum.

Examples :

"My cousin has autism; his behavior falls within the autism spectrum. "

Mon cousin est autiste ; son comportement se situe dans le spectre de l'autisme.

medicine mind condition toefl

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noun

Le spectre

The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).

Examples :

"The scientist examined the spectrum of light emitted by the burning candle flame. "

Le scientifique a examiné le spectre de la lumière émise par la flamme de la bougie en combustion.

physics energy science phenomena range toefl

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noun

Le spectre, l'ensemble des valeurs propres d'une matrice

The set of eigenvalues of a matrix.

Examples :

"The spectrum of possible test scores for the math exam ranged from 60 to 100. "

Le spectre des notes possibles à l'examen de mathématiques allait de 60 à 100.

math technical toefl

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noun

Spectre

Of a bounded linear operator A, the set of scalar values λ such that the operator A—λI, where I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

Examples :

"The spectrum of possible outcomes for the student's final exam grade shows a wide range of possibilities, from a failing mark to an A+. "

Le spectre des résultats possibles pour la note finale de l'élève montre un large éventail de possibilités, d'une note d'échec à un A+.

math science technical physics toefl

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noun

Spectre

(abstract algebra) The set, denoted Spec(R), of all prime ideals of a given ring R, commonly augmented with a Zariski topology and considered as a topological space.

Examples :

"The spectrum of possible grades on the math exam included all the prime numbers from 2 to 100. "

Le spectre des notes possibles à l'examen de mathématiques comprenait tous les nombres premiers de 2 à 100.

math abstract space toefl

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noun

Spectre, apparition

Specter, apparition.

Examples :

"The angry accusations from the teachers seemed like a menacing spectrum hanging over the entire school. "

Les accusations colériques des professeurs semblaient être un spectre menaçant planant au-dessus de toute l'école.

appearance supernatural being toefl

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noun

Image rémanente

The image of something seen that persists after the eyes are closed.

Examples :

"After looking at the vibrant sunset, a spectrum of orange and pink colors remained in my mind's eye. "

Après avoir regardé le coucher de soleil vibrant, une image rémanente de couleurs orange et rose est restée dans mon esprit.

mind sensation phenomena toefl