Do charges (static or moving) reflect light?

  • Thread starter think
  • Start date
  • #1
19
0
Do charges (static or moving) reflect light? If no, then how can we see a spark?
 

Answers and Replies

  • #2
LURCH
Science Advisor
2,552
118
A spark emits light, it doesn't have to reflect it to be seen.
 
  • #3
Alexander
Free charges indeed reflect light, and quite well. Look at a mirror - it is free electrons which reflect.

Charges also emit very well when they move with acceleration. That is why we see a spark, a flame, Sun, etc.
 
  • #4
19
0
And what makes spark to emit light?
 
  • #5
FZ+
1,589
3
The spark heats up the air to tremendous temperatures (into a plasma), which then emit their energy as light.
 
  • #6
Alexander
Originally posted by think
And what makes spark to emit light?

Atoms are electric charges, right? Right. They have electric field around them. When you shake an atom (say, atom is fast thermal motion in a spark), then field begin to shake too. This shaking electric field is what we call "light".
 

Related Threads on Do charges (static or moving) reflect light?

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
9
Views
3K
Replies
1
Views
2K
  • Last Post
Replies
6
Views
1K
  • Last Post
Replies
1
Views
684
  • Last Post
Replies
3
Views
704
  • Last Post
Replies
6
Views
2K
  • Last Post
Replies
16
Views
4K
  • Last Post
Replies
3
Views
6K
Top