What weird and cool effects occur when two gigantic mirrors face each other????

Question: What weird and cool effects occur when two gigantic mirrors face each other????
- Keywords:
  effect,
  fun,
  light,
  mirror,
  reflection
Asked by lozzapotter2011 to Amelia, Jim, Liz, Prateek, Richard on 22 Jun 2011.
- Amelia Markey answered on 21 Jun 2011:
  
  Well they would reflect each other so you would see lots images going on and on and on.
  
  Best thing to do when you don’t know the answer to something like this is try it out. Get two mirrors and put them opposite each other and see what happens. Try varying the size of the two mirrors and the angles they are at relative to each other and see if you get different effects!
- Jim Caryl answered on 22 Jun 2011:
  
  I agree, try it out. I think that in mysticism circles, in the old days, people thought it could capture your soul, or other such superstitious belief. I don’t doubt that reflection like this has all sorts of physical quirks that could be explored, and perhaps a physicist may have more insight about scientific uses for such an arrangement of mirrors?

Question: What weird and cool effects occur when two gigantic mirrors face each other????