Problems on structure of atom and X-rays

The Structure Of Atom

Atomic structure

Atomic Structure

Various atomic structure| bohrs atomic model

For the structural analysis of crystals, X-rays are used because

Daltons theory of atom & Discovery of cathode rays anode rays

Which of the following is correct regarding X-rays (i) X-rays are electromagnetic radiation (photon) of short wavelength. X-rays move in straight lines in vacuum at a speed equal to that of light (ii) Since X-rays are charge-less particles and therefore not deflected by electric or magnetic fields (iii) X-rays are diffracted by crystals in accordance with Bragg's law. The Bragg's law states 2 d sin theta=n lambda , where n is integer. theta is the angle at which X-ray is incident on the plane of atoms, d: distance between the parallel planes of atom (iv) X-rays affect a photographic plate more strongly than visible light