(a)(i) By means of a labelled diagram, describe the mode uf operation of a modern X-ray tube.

(ii) State the energy transformation which takes place during the operation.

(b) Explain the terms hardness and intensity as applied to X-rays

(c)(i) State three uses of X-rays

(ii) State one hazard of over-exposure to X-rays in a radiological laboratory, indicating two safety precautions.