Ray may refer to:
Fish
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Ray (fish)
Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 fa ...
, any cartilaginous fish of the superorder Batoidea
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Ray (fish fin anatomy)
Fins are distinctive anatomical features composed of bony spines or rays protruding from the body of a fish. They are covered with skin and joined together either in a webbed fashion, as seen in most bony fish, or similar to a flipper, as se ...
, a bony or horny spine on a fin
Science and mathematics
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Ray (geometry)
In geometry, a line is an infinitely long object with no width, depth, or curvature. Thus, lines are one-dimensional objects, though they may exist in two, three, or higher dimension spaces. The word ''line'' may also refer to a line segmen ...
, half of a line proceeding from an initial point
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Ray (graph theory) In the mathematics of infinite graphs, an end of a graph represents, intuitively, a direction in which the graph extends to infinity. Ends may be formalized mathematically as equivalence classes of infinite paths, as havens describing strategies f ...
, an infinite sequence of vertices such that each vertex appears at most once in the sequence and each two consecutive vertices in the sequence are the two endpoints of an edge in the graph
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Ray (optics)
In optics a ray is an idealized geometrical model of light, obtained by choosing a curve that is perpendicular to the '' wavefronts'' of the actual light, and that points in the direction of energy flow. Rays are used to model the propagation ...
, an idealized narrow beam of light
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Ray (quantum theory) In mathematics and the foundations of quantum mechanics, the projective Hilbert space P(H) of a complex Hilbert space H is the set of equivalence classes of non-zero vectors v in H, for the relation \sim on H given by
:w \sim v if and only if v = ...
, an equivalence class of state-vectors representing the same state
Arts and entertainment
Music
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The Rays
The Rays were an American group formed in New York City in 1955, and active into the early 1960s. They first recorded for Chess Records. Their biggest hit single was " Silhouettes", a moderately-slow doo-wop piece of pop music that reached num ...
, an American musical group active in the 1950s
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