1428 
<I 
distance from charge 
charge radius 
charge weight 
see Formula 9 
distance in charge radii 
angle between wavefront and normal to the surface 
critical. angle 
critical distance 
critical distance in charge radii 
charge depth | 
charge depth in charge radii 
depth of boundary of disturbance in a distance 
from charge 
y, expressed in charge radii 
viii 
x 
