Question 8: X-rays can emit electron from metal surface and X-rays can be diffracted. Comment.
X-rays are electromagnetic radiations of a very small wavelength. Therefore, it exhibits both particle and wave characteristics. The statement given in the question points to this dual nature of X-rays radiations.
When X-rays fall on a metal surface, the X-rays photons behave like particles and eject electrons from the metal surface.
Similarly, when X-rays are incident on a crystal structure like NaCl, it exhibits wave nature and diffracted from the atoms in various layers of the crystal structure. This property is frequently used in determining the crystal structure in laboratories.