how does light travel through a camera?

Question: how does light travel through a camera?
- Keywords:
  camera
Asked by susejdog to Damien, Rachael, Simon, Suzi, Tim on 16 Jun 2011.
- Suzi Gage answered on 16 Jun 2011:
  
  Hi @susejdog
  I’m afraid I’m not sure – I remember looking at this in physics class at school, but I can’t remember any more.
  
  Sorry about that, maybe someone else can remember.
  Otherwise, this may help
  http://www.howstuffworks.com/camera.htm

Question: how does light travel through a camera?