WAVEGUIDE TRANSMISSION 



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at times as if tiiey were different aspects of the same thing. They are as 

 follows: 



1. Lilies of magnetic force, when displaced laterally, induce in the space 

 immediately adjacent, lines of electric fcrce. The direction of the induced electric 

 force is perpendicular to the direction of motion and also perpendicular to the 

 direction of the original magnetic force. The intensity E of the induced electric 



LINE OF ELECTRIC FORCE 



LINE OF MAGNETIC FORCE 



Fig. 6.1-3. Directions of electric vector E and magnetic vector // relative to the velocity 



V of motion of such lines. 



Fig. 6.1-4. Simple corkscrew rule for remembering the directions of E, 11 and v. 



force is proportional to the velocity v of displacement and proportional to the 

 intensity H of the original lines of magnetic force. 



The directions of the vectors v, E and H are shown in Fig. 6.1-3. They 

 are so related that, when E moves clockwise into H, it is as though a right- 

 hand screw had progressed in the direction of v as shown in P'ig. 6.1-4. 

 A convenient short-hand notation used rather generally by mathematicians 

 makes it possible to express these facts by the following vector equation: 



E = -;u(vxH) 



(6.1-1) 



