Assertion : Standard optical diffraction grat | vedclass

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Question

(A) For diffraction to occur,the size of the obstacles or the spacing between the slits in a diffraction grating must be of the order of the wavelengt

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) For diffraction to occur,the size of the obstacles or the spacing between the slits in a diffraction grating must be of the order of the wavelength of the incident radiation.The wavelength of $X-$rays is typically in the range of $0.01 \ nm$ to $10 \ nm$.Standard optical diffraction gratings have a grating spacing (distance between adjacent lines) of the order of $10^3 \ nm$ to $10^4 \ nm$.Since the grating spacing is much larger than the wavelength of $X-$rays,the diffraction effect is negligible,and these gratings cannot be used to discriminate between $X-$ray wavelengths.Therefore,both the Assertion and the Reason are correct,and the Reason is the correct explanation of the Assertion.

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

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