CollageFisica

(from top-left, clockwise)

1. Refraction of light (which is described by w:en:Optics)
2. A laser
3. A hot air balloon
4. A spintop (whose movement is described by classical mechanics)
5. The effects of an inelastic collision
6. Atomic orbitals of hydrogen (which are described by w:en:quantum mechanics)
7. An atomic bomb exploding
8. Lightning (which is an electrical phenomenon)
9. Galaxies (photo made by the Hubble Space Telescope)

Collage created by uploader

• 
  Fastfission, United States Department of Energy, public domain
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  FlorianMarquardt, GFDL
• 
  NASA, ESA, S. Beckwith (STScI) and the HUDF Team, public domain
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  public domain
• 
  NASA, public domain
• 
  Jon Sullivan (pdphoto.org), public domain
• 
  Auréola, cc-by-sa-2.0
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  public domain
• 
  National Oceanic and Atmospheric Administration, public domain