what is the most interesting concept you have come accross in your job

Question: what is the most interesting concept you have come accross in your job
- Keywords:
  career,
  concept,
  interesting
Asked by gave521yore on 3 Oct 2024.
- Steve Potterill answered on 3 Oct 2024:
  
  14 years after leaving university I found out that some of the physics I learnt (regarding interactions of electro-magnetic waves with the ionosphere), was being used in a specialist radar system, and that my old professor was the consultant for that system.

Question: what is the most interesting concept you have come accross in your job