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action spectrum

n.
1.the efficiency with which electromagnetic radiation produces a photochemical reaction plotted as a function of the wavelength of the radiation

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    Idiom of the Day

    pig in a poke
    something accepted or bought without looking at it carefully
    The used bicycle that I bought was a pig in a poke. I do not know if I will like it.



    1.
    She is thinking of blocking up the bedroom window because ________ have got into the house through it a couple of times so far.

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