As a preliminary to a detailed study of the reactions of certain body tissues to electromagnetic radiations on centimetre wave-lengths, it has been found desirable to determine the propagation ...

Electromagnetic waves can be separated into seven distinct groups in the spectrum. Each group contains ... frequencies that can be detected by the human eye: ...

Radiation from different regions of the electromagnetic spectrum can affect the human body in many ways. Discuss the different ways in which excessive exposure to electromagnetic radiations of ...