State Bragg's law.

Braggs Law

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

State Boyle's law and Charles law.

(a) State boyle's law. (b) State Newton's second law.

State Ampere's law and Biot-Savart law.

State Ampere's law and Faraday's law in mathematical form.