# Name the types of e.m. radiations

Name the types of e.m. radiations which (i) are used in. destroying cancer cells, (ii) cause tanning of the skin and (iii) maintain the earth’s warmth. Write briefly a method of producing any one of these waves.

(i) $\gamma$ rays (or X-rays)
(ii) Ultraviolet rays
(iii) Infrared rays
Production: