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diffraction grating

n.
1.optical device consisting of a surface with many parallel grooves in it

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  • diffraction
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  • difficulty
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  • diffuse nebula
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  • Idiom of the Day

    meet one's end/death
    to die
    The elderly man met his death in an accident while walking across the street.



    1.
    (1) Freedom, which
    (P) in the sense
    (Q) that a wide gylf separates
    (R) a modern woman enjoys,
    (S) is the restricted kind,
    (6) the rich and the poor women.

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