﻿430 
  Dr. 
  S. 
  R. 
  Milner 
  on 
  Interference 
  Fringes 
  

  

  with 
  any 
  other 
  light. 
  In 
  the 
  same 
  space 
  by 
  looking 
  in 
  the 
  direc- 
  

   tion 
  EF 
  the 
  transmitted 
  system 
  can 
  also 
  be 
  seen 
  just 
  within 
  the 
  

  

  Fig. 
  2. 
  

  

  ft 
  

  

  first 
  shadow 
  of 
  the 
  obstacle. 
  Unlike 
  the 
  Newton's 
  rings, 
  the 
  

   transmitted 
  system 
  is 
  quite 
  as 
  bright 
  as 
  the 
  reflected 
  one, 
  

   and 
  is 
  perhaps 
  the 
  more 
  convenient 
  for 
  observation. 
  The 
  

   region 
  FG 
  is 
  followed 
  by 
  second 
  (GH) 
  and 
  third 
  &c, 
  cor- 
  

   responding 
  spaces 
  in 
  which 
  the 
  fringes 
  can 
  also 
  be 
  seen, 
  due 
  

   to 
  still 
  further 
  reflexions 
  of 
  the 
  light 
  from 
  the 
  non-adjacent 
  

   glass 
  faces, 
  but 
  the 
  fringes 
  are 
  usually 
  distorted 
  and 
  rapidly 
  

   become 
  fainter 
  unless 
  the 
  incidence 
  is 
  very 
  oblique. 
  

  

  Ear. 
  3. 
  

  

  Fig. 
  3 
  is 
  a 
  photograph 
  of 
  the 
  transmitted 
  fringes 
  obtained 
  

   in 
  this 
  way 
  with 
  two 
  pieces 
  of 
  plate-glass, 
  cut 
  from 
  the 
  same 
  

  

  