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  4. X-rays are used in determining the molecular structure of crystalline, because

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Q. X-rays are used in determining the molecular structure of crystalline, because

Jharkhand CECEJharkhand CECE 2014

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.