Braggs Law

Bragg's Law||Davisson-Germer Experiment

Characteristic X-Rays||Moseley's Law||Bragg's Law||Absorption and Proportion OF X-Rays

Bragg's law is given by the equation:

Bragg's law for X-rays is

Assertion : X - rays cannot be diffracted by means of grating . Reason : X - rays does not obey Bragg's law.

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