Just when you think you’ve got physics… | Brief letters

The joy of physics | TV theme tunes | Weather forecasts | The cost of war

Your correspondence on quantum mechanics (Editorial, 30 August; Letters, 3 September) reminded me of a conversation that I had 50 years ago with a German biologist. He told me that as a teenager he had wanted to be a theoretical physicist and went to a lecture by Wolfgang Pauli on the latter's exclusion principle. Seeking out Pauli at the end, he said: That was wonderful, I could see exactly what you meant." Pauli's reply: If you could see it, you didn't get it." I gathered that was why he chose biology.
Prof John Galloway
Croxley Green, Hertfordshire

Richard Walker (Letters, 3 September) is right about the brilliant Crossroads TV theme. I've always felt that some programmes were more popular than they deserved to be purely because of their theme tune. An obvious candidate was the 1970s detective series Van der Valk, whose excellent theme tune, Eye Level, seemed to raise it above the average.
Dougie Mitchell
Edinburgh