Light reflected 90° out of phase, not 180°!

  • Thread starter damosuz
  • Start date
  • #1
72
0
Classically, we explain why light appears to move slower in glass by saying that the electrons in glass emit a light wave which is 90° out of phase with the light wave shaking them. However, the electrons would have to emit this wave not only in the incident direction, but in the opposite direction as well, which would be the reflected wave. This means the reflected wave is 90° out of phase with the incident wave, and not 180° as it is mentioned everywhere (often by making an analogy with string attached to a rigid wall). What am I missing here?
 

Answers and Replies

  • #2
blue_leaf77
Science Advisor
Homework Helper
2,629
784
the electrons in glass emit a light wave which is 90° out of phase with the light wave shaking them
This is new to me. Can you mention the source?
 

Related Threads on Light reflected 90° out of phase, not 180°!

Replies
21
Views
3K
  • Last Post
Replies
3
Views
1K
  • Last Post
Replies
2
Views
2K
Replies
12
Views
4K
Replies
7
Views
7K
Replies
1
Views
2K
Replies
4
Views
798
Replies
3
Views
762
  • Last Post
Replies
4
Views
2K
Top