- #1
desmond iking
- 284
- 2
Homework Statement
according to the notes in the photo, the light ray undergo of phase change of 0.5 λ when it strike and reflected from glass surface (denser) at point A . so the OPD of ray 1 &2 = 2nt-0.5λ..
but in the 2nd photo , the OPD of ray 1 & 2 is given by 2nt+0.5λ . i am not sure which one is correct. can someone enlighten me on this?