Arrange the following electromagnetic radiations in ascending order to their frequencies :
(i) Microwaves
(ii) Radio waves
(iii) X-rays
(iv) Gamma rays
Write two uses of any one of these.[Delhi Comptt. I, II, III 2013, O.D. I, II, III 2010]
Radio waves < Microwaves < X-rays < Gamma
Uses of Microwaves : (a) Aircraft navigation, (b) Ovens [CBSE Marking Scheme, 2013]