Corona-virus is bad, but it does have one advantage: more time to work on my hobby ! I finally managed to have a look at what the (in)famous Lamb shift may or may not be. Here is the link to the paper.
I think it’s good. Why? Well… It’s that other so-called ‘high precision test’ of mainstream quantum mechanics (read: quantum field theory)m but so I found it’s just like the rest: ‘Cargo Cult Science.’ [I must acknowledge a fellow amateur physicist and blogger for that reference: it is, apparently, a term coined by Richard Feynman!]
To All: Enjoy and please keep up the good work in these very challenging times !