[Robotgroup] compressed light

[Denise Scioli]

One of my students was asking about compressed light.  He thought that a 
laser is a form of compressed light.  I thought it was a more focused beam 
of light.  What is the truth. Once we got talking, I realized that I didn't 
know what I was saying, and admitted it, and he realized that he didn't know 
what he was saying, and we both have inquiring minds and we both would like 
an answer.  Today is his last day at my school, so any clarification before 
2:00 p.m today would be helpful.

Thanks for any help on this matter

Denise Scioli