Subject: Area of illumination

We are doing an experement at school with area of illumination.  We 
experemented with it by putong a light bulb at the end of a meter 
stick and put a piece of black papper with a squred cemtemeter cut 
out of it then we put a piece of graph papper 5 mm away from the 
black papper and when we turned out the lights we counded out how 
many squares came up on the graph papper we kept doing that but each 
time we did that we moved the construction papper back 5 mm.  next we 
did the exact thing but we used a flash light rather than a light 
bulb.  Then we tryed it with the sun (but obviously the sun wasn't at 
the end of the meter stick. My science teacher wante us to find out 
more one area of illumination. And if you have any type of 
information an area of ilumation it would come in great need for me. 
Thanks, 
  Laura

Re: Area of illumination