p34_010 - 10. Using S = (1/0 )E B , we see that (on the...

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10. Using ~ S =(1 0 ) ~ E × ~ B , we see that (on the right hand) letting the thumb be in the ~ E direction and the index fnger be in the ~ B direction means that the middle fnger (held perpendicular to the other two, making a “triad” oF the thumb and two fngers) points in the direction oF wave propagation (the direction
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