A : Standard optical diffraction gratings cannot be used for discriminating between different X-ray wavelengths. R : The grating spacing is not of the order of X-ray wavelengths.

A : Standard optical diffraction gratings cannot be used for discrimin

1.	A : Standard optical diffraction gratings cannot be used for discriminating between different X-ray wavelengths. R : The grating spacing is not of the order of X-ray wavelengths.
Answer» Both A and R are TRUE and R is the CORRECT explanation of A Both A and R are true and R is not the correct explanation of A A is true and R is false Both A and R are false Answer :A

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A : Standard optical diffraction gratings cannot be used for discriminating between different X-ray wavelengths. R : The grating spacing is not of the order of X-ray wavelengths.

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