JCECE Medical JCECE Medical Solved Paper-2014

  • question_answer
    X-rays are used in determining the molecular structure of crystalline, because

    A)  its energy is high

    B)  it can penetrate the material 

    C)  its wavelength is comparable to interatomic distance

    D)  its frequency is low

    Correct Answer: C

    Solution :

     Crystal structure is explored through the diffraction of waves having a wavelength comparable with the interatomic spacing \[\ ({{10}^{-10}}\,m)\] in crystals. Radiation of longer wavelength cannot reslove the details of structure, while radiation of much shorter wavelength is diffracted through inconveniently small angles. Usually diffraction of X-ray is employed in the study of crystal structure as X-ray   have  wavelength   camparable   to interatomic spacing.


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