232 On Polarization of Light by Refraction. 
Serene by Fgattnaie fertile tee-quantny at reflected light is. 
nigh gee ez 3 sin? (i—v) tan? (i—7) it | 
na Sey Re =i (i+? ie) + tan? Aaa hg eae 
the gua of transmitted light T willbe | ee 
nod aR , (sin? (i@-v) tan? (c—7’) iodine sie 
aie _T=1- Asin (¥) "tan? (i+) i oe se 
(4 (sin? @—W) , tan? i=0))) (cos (i=#))? ) 
ges ace \aB? (4a) + tan? (i+2/) wie: 27+ (cos(i#))2 1 
This Sepuaila:i is applicable to common light in which cot #=1 dis-_ 
appears from the equation; but on the same principles which we 
es RPS ina rege a — it becomes for perieaaenee 
ft (i ry tan? (4— =v) ee | 
w= (1-: sem (+7) oa as +o aa sin’ 1): < te 
~~» (cot a cos (t= 7’))? a fet 
(1-2 st 1-4 (cot 2 cos (i= 7)" 
In all these cases the formula expresses the sarees of light ral 
ly or apparently seats in the plane of refractio 
~ As the planes of polarization of a pencil pln a 
zation of light by refraction, which we deduced in a preceding p@- 
per respecting the partial polarization of light. by reflexion. Each 
refracting surface produces a change in the position of the planes of 
, and consequently a physical change upon the transmit- 
sokpean by which it has approached to the state of complete po- 
"This positon I shall illustrate beara eink = Se 
riments shiek Se published in al Trai 
for 1814. 
According to the | fet a acta light of a wax 
candle at the distance of ten or twelve feet is ‘wholly polarized by 
