17 Which of the following is a feature of Xdiffraction A Rad

17) Which of the following is a feature of X-diffraction?

A) Radiation passing through a structure will be scattered only if the structure contains repeating units.

B) Scattered radiation from repeating units in a structure will be weakened by interference.

C) Scattered radiation from repeating units in a structure will be strengthened by interference.

D) Short spacings in repeating structures will result in short spacings in diffraction patterns.

E) The wavelength of radiation used to generate diffraction patterns must be slightly longer than the spacings between the repeating units of the structure.

Solution

C) Scattered radiation from repeating units in a structure will be strengthened by interference.

If the molecule has regular structure then the repeating unit can give rise to constructive interference.