TABLES 208-21 0.-THE REFLECTION OF LIGHT. 



197 



According to Fresnel the amount of light reflected by the surface of a transparent medium 



= 1 (A + B\ = l \ S ! n !! l 'T r ! + tan !! / ~ r ! [ ; A is the amount polarized in the plane of inci- 



2 I sm 2 (* + r) tan (* + r } f 

 deuce ; B is that polarized perpendicular to this ; * and r are the angles of incidence and refraction. 



TABLE 208. Light reflected when i = or Incident Light Is Normal to Surface. 



TABLE 209. Light reflected when n Is near Unity or equals l + <ln. 



TABLE 210. Light reflected when n = 1.55. 



Angle of total polarization = 5 7 xo'.s, A = 16.99. 



* This column pives the degree of polarization. t Columns 5 and 6 furnish a means of 



determining A and B for other values of . They represent the change in these quantities for a change of ot o.oi. 



Taken from E. C. Pickering's " Applications of Fresnel's Formula for the Reflection of Light." 

 SMITHSONIAN TABLES. 



