Assertion: Crystalline solids can cause X-rays to diffract.
Reason: Interatomic distance in crystalline solids is of the order of `0.1nm`.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion.
B. If both assertion and reason are truw but reason is not correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false.

Answer

C

Explanation

For diffraction,the slit width should be of the order of the incident wavelength.The regular spacing of the atoms in crystal is of the order of wavelength of X-rays (0.1nm)beacause of which X-rays are diffracted from the crystals.