Questions

1. What are laser modes (longitudinal and transverse)?
   
2. Simple question, can I see them? --show me!
   
3. Where do they come from? where do they go? why do we care about them? what can we benefit from understanding the laser mode dynamics?
4. Another straight question, can I manipulate laser modes (longitudinal and transverse)? if yes, how?
5. What are origins of laser modes (longitudinal and transverse)? --in details!
   
6. How do they develop from noise? --in details