X-rays cannot be deflected by means of an ord | vedclass

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(C) For diffraction to occur,the wavelength of the incident wave must be comparable to the spacing between the lines of the grating. $X$-rays have ver

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Short wavelength

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(C) For diffraction to occur,the wavelength of the incident wave must be comparable to the spacing between the lines of the grating. $X$-rays have very short wavelengths (typically $0.01 \ nm$ to $10 \ nm$). An ordinary optical grating has a spacing of the order of $10^3 \ nm$ to $10^4 \ nm$. Since the wavelength of $X$-rays is much smaller than the grating spacing,they cannot be diffracted by an ordinary grating. Therefore,the correct option is $C$.

$X$-rays cannot be deflected by means of an ordinary grating due to

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