Question

Statement I: $X$ -rays cannot be diffracted by means of grating.
Statement II: $X$ -rays does not obey Bragg's law.

• A. If both statements are true and statement II is the correct explanation of statement I
• B. If both statements are true but statement II is not the correct explanation of statement I
• C. If statement I is true but statement II is false
• D. If both statements are false

Answer 1

Answer: (C)

Wavelength of $X$ -rays is very small $(\approx \mathring{A}) .$ Hence they are not diffracted by means of ordinary grating. $X$ -rays follows the Bragg's law.