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Spectrum vs Gradient - What's the difference?

spectrum | gradient |

As nouns the difference between spectrum and gradient

is that spectrum is specter, apparition while gradient is gradient.

spectrum

English

(wikipedia spectrum)

Noun

(en-noun)
  • Specter, apparition.
  • A range; a continuous, infinite, one-dimensional set, possibly bounded by extremes.
  • * {{quote-news, year=2012, date=November 7, author=Matt Bai, title=Winning a Second Term, Obama Will Confront Familiar Headwinds, work=New York Times citation
    • , passage=As Mr. Obama prepared to take the oath, his approval rating touched a remarkable 70 percent in some polling — a reflection of good will across the political spectrum .}}
  • Specifically, a range of colours representing light (electromagnetic radiation) of contiguous frequencies; hence electromagnetic spectrum, visible spectrum, ultraviolet spectrum, etc.
  • * 2010 October 30, Jim Giles, Jammed!'', in '' ,
    • Current 3G technologies can send roughly 1 bit of data - a one or a zero - per second over each 1 Hz of spectrum that the operator owns.
  • (chemistry) The pattern of absorption or emission of radiation produced by a substance when subjected to energy (radiation, heat, electricity, etc.).
  • (mathematics, linear algebra) The set of eigenvalues of a matrix.
  • (mathematics, functional analysis) Of a bounded linear operator A'', the set of scalar values ? such that the operator ''A—?I'', where ''I denotes the identity operator, does not have a bounded inverse; intended as a generalisation of the linear algebra sense.

    • Derived terms

    * light spectrum * spectro- * spectrum disorder

    Related terms

    * spectral

    Anagrams

    * English nouns with irregular plurals ----

    gradient

    English

    Noun

    (en noun) (slope) (wikipedia gradient)
  • A slope or incline.
  • A rate of inclination or declination of a slope.
  • (calculus) Of a function y'' = ''f''(''x'') or the graph of such a function, the rate of change of ''y'' with respect to ''x''
    that is, the amount by which ''y'' changes for a certain (often unit) change in ''x
    equivalently, the inclination to the X axis of the tangent to the curve of the graph.
  • (science) The rate at which a physical quantity increases or decreases relative to change in a given variable, especially distance.
  • (analysis) A differential operator that maps each point of a scalar field to a vector pointed in the direction of the greatest rate of change of the scalar. Notation for a scalar field ?: ∇φ

    • Synonyms

    * (slope) hill, incline, ramp, slope * (in calculus) slope (of a line )

    Derived terms

    * gradient wind * ruling gradient * supergradient * temperature gradient

    Adjective

    (-)
  • Moving by steps; walking.
    • gradient automata
    (Wilkins)
  • Rising or descending by regular degrees of inclination.
    • the gradient line of a railroad
  • Adapted for walking, as the feet of certain birds.

    • Anagrams

    * * * * ----