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  1. Which, of the following radiations has the least wavelength ?

    2. A.

     X-rays
    B.

     A-rays
    C.

     G-rays
    D.

     B-rays

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    Answer : Option C

    Explanation :

    X-rays – smaller than 10 nano metre. Gamma- rays – 0.0005 to 0.1 nano metre. Alpha-rays – 125 nano metre.

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